I was trying to find a Ursaluna Trick Room composition but with a full support setter, but not completely revolving around the big bear. I've run some testing in Showdown, and out of 10 matches, I won 7 and lost 3. If I were to say, the major flaws of this team is that if you mess the set, it's almost impossible to win - this being the reason I lost one the 4th match. It also doesn't perfom well against Fire/Fighting Pokémon such as Blaziken, and other mons such as Malamar can be a pain in the ass. The most annoying loss definitely was against a Illumise/Serperior duo, both running and spamming Substitute. If you find a way to fit a Substitute-bypass into the team, please reply because that was so annoying 
INDEEDEE (FEMALE)
Tera Fairy; Safety Goggles; Psychic Surge
Sassy nature
EVs - 252 HP, 220 Defense, 36 Special Defense
IVs - 0 Attack, 0 Speed
Psychic
Follow Me
Helping Hand / Protect / Heal Pulse
Trick Room
Psychic Surge will set Psychic Terrain, preventing Ursaluna of being hit by priority moves such as Fake Out, while Protect remains a priority move. After setting Trick Room, use Follow Me if the foes resists Ursaluna's Facade or Headlong Rush, but I recommend using Helping Hand to boost Ursaluna's attack if they aren't resistant. It's important to have Psychic in your moveset not only due to it being a strong psychic-type move, but also to prevent the oposing team of using Taunt and forcing you to switch her out. You can switch Helping Hand for Protect if you prefer using Ursaluna's Earthquake, but you can also use it if your Indeedee's with a really low HP. Follow Me is also an option to switch for Protect, although I personally do not recommend, since you would've lose a really strong supporting move. Tera Fairy is the one I recommend the most due to Fairy being only weak to Steel and Poison, which can be dealt with since Indeedee's will always be paired with Ursaluna, a Earth-type, and Psychic can deal Super Effective damage in Poison-types, and especiallly Sneasler who's 4x weak to Psychic. It's also a possibility to switch Helping Hand with Heal Pulse, since Ursaluna will be worn out over time due to Flame Orb. I personally prefer Safety Goggles instead of Focus Sash because, most of the time, both oponent Pokémon will attack her.
URSALUNA
Tera Normal; Flame Orb; Guts
Brave nature
EVs - 248 HP, 252 Attack, 8 Special Defense
IVs - 0 Speed
Facade
Headlong Rush
Earthquake
Protect
While Unnerve has it's niche, I don't recommend it since it's only useful in very specific situations, so I prefer using Guts, not only due to Bulletproof being useless, but also because it pairs perfectly with Facade, one of Ursaluna's strongest moves. Flame Orb paired with Guts and Facade makes a ridicoulos heavy blow, 1-hit-KO'ing a lot of Pokémon; of course, it's not good against Steel, who resists it, and Ghost-types, which is immune to, so for these, you use Headlong Rush. Protect is used for when Indeedee's is setting up Trick Room, so you guarantee the enemy team isn't oneshoting Ursaluna. Tera Normal is the perfect fit for this Pokémon due to it still holding it's Ghost immunity and, since it's always paired with Indeedee, Fighting-types aren't an actual menace.
PORYGON2
Tera Ghost; Eviolete; Download
Relaxed nature
EVs - 252 HP, 172 Defense, 84 Special Defense
IVs - 0 Speed, 0 Attack
Ice Beam
Thunderbolt
Trick Room
Recover
Porygon2's primary role is to be a mid-match Trick Room setter, as Indeedee's most likely will faint. Paired with Incineroar, who's purposeful slow, it's also good to have Thunderbolt to deal with Water-types and Ice Beam to threat Ground-types, which Incineroar is weak against. Porygon2's can also be used as an early-match Trick Room setter, in case Indeedee's faints before she can set up Trick Room. Tera Ghost is used for it to lose it's Fighting weakness, as Incineroar, the usual Porygon2 partner, is also weak to it; however, Incineroar makes up for the Ghost-type weaknesses that comes with the Terastalization, since it can learn strong Dark-types moves such as Knock Off and Throat Chop, and Fighting-type moves like Close Combat
INCINEROAR
Tera Ghost; Heavy-Duty Boots; Intimidate
Careful nature
EVs - 252 HP, 96 Defense, 160 Special Defense
Fake Out / Close Combat
Flare Blitz
Knock Off / Throat Chop
Parting Shot
Incineroar's role is mainly to be a chipping Pokémon with Fake Out and Knock Off to abuse oposing Pokémon, slowly and steadily defeating 'em. You can also use it's Parting Shot to switch up with Ursaluna or Ogerpon, using him in a hit-and-run way. It's Tera Ghost nullifies it Fighting weakness, making Incineroar immune to it, as well as neutral damage to Water, Ground and Rock. Knock Off can deal with oposing Ghosts, and if you don't feel safe against the Dark-type Pokémon, you can use Close Combat instead of Fake Out for coverage. I personally don't because most of the time I terastalize Ursaluna.
OGERPON-CORNERSTONE
Tera Rock; Cornerstone Mask; Sturdy
Jolly nature
EVs - 252 Attack, 4 Special Defense, 252 Speed
Ivy Cudgel
Power Whip
Follow Me / Swords Dance
Spiky Shield
Ogerpon's role in this team is to be a cleaner, being a fast physical sweeper, Ivy Cudgel can deal massive damage, and Power Whip grants a grass coverage against Rock and Ground types. Follow Me is the to-go in case you want to protect some other team member, but you can switch it for Swords Dance to increase it's sweep capabilities even further alongside the help of Amoonguss' Spore. Spiky Shield is here to check opponentes, seeing if they outspeed you or have priority moves.
AMOONGUSS
Tera Water; Sitrus Berry; Regenerator
Calm nature
EVs - 244 HP, 208 Defense, 56 Special Defense
IVs - 0 Attack, 28 Speed
Spore
Rage Powder
Pollen Puff
Clear Smog
Amoonguss is the wall of the team. While Ursaluna has a good bulky, it's designed here to hit hard, while the fungus is a sponge, redirecting hits with Rage Powder, allowing Ogerpon to keep it's Sturdy ability; if you want a complete turnaround, you can also start the match with Amoonguss and Indeedee/Porygon2, due to it's incredible bulky paired with Regenerator and Rage Powder. Amoonguss can also be a support for Ursaluna, due to it's Pollen Puff ability, and counter to oposing Intimidate users with the move Clear Smog. Spore is the perfect option if you are running a Swords Dance Ogerpon, or if you want to sweep with Incineroar's Flare Blitz / Ogerpon's Ivy Cudgel.
INDEEDEE (FEMALE)
Tera Fairy; Safety Goggles; Psychic Surge
Sassy nature
EVs - 252 HP, 220 Defense, 36 Special Defense
IVs - 0 Attack, 0 Speed
Psychic
Follow Me
Helping Hand / Protect / Heal Pulse
Trick Room
Psychic Surge will set Psychic Terrain, preventing Ursaluna of being hit by priority moves such as Fake Out, while Protect remains a priority move. After setting Trick Room, use Follow Me if the foes resists Ursaluna's Facade or Headlong Rush, but I recommend using Helping Hand to boost Ursaluna's attack if they aren't resistant. It's important to have Psychic in your moveset not only due to it being a strong psychic-type move, but also to prevent the oposing team of using Taunt and forcing you to switch her out. You can switch Helping Hand for Protect if you prefer using Ursaluna's Earthquake, but you can also use it if your Indeedee's with a really low HP. Follow Me is also an option to switch for Protect, although I personally do not recommend, since you would've lose a really strong supporting move. Tera Fairy is the one I recommend the most due to Fairy being only weak to Steel and Poison, which can be dealt with since Indeedee's will always be paired with Ursaluna, a Earth-type, and Psychic can deal Super Effective damage in Poison-types, and especiallly Sneasler who's 4x weak to Psychic. It's also a possibility to switch Helping Hand with Heal Pulse, since Ursaluna will be worn out over time due to Flame Orb. I personally prefer Safety Goggles instead of Focus Sash because, most of the time, both oponent Pokémon will attack her.
URSALUNA
Tera Normal; Flame Orb; Guts
Brave nature
EVs - 248 HP, 252 Attack, 8 Special Defense
IVs - 0 Speed
Facade
Headlong Rush
Earthquake
Protect
While Unnerve has it's niche, I don't recommend it since it's only useful in very specific situations, so I prefer using Guts, not only due to Bulletproof being useless, but also because it pairs perfectly with Facade, one of Ursaluna's strongest moves. Flame Orb paired with Guts and Facade makes a ridicoulos heavy blow, 1-hit-KO'ing a lot of Pokémon; of course, it's not good against Steel, who resists it, and Ghost-types, which is immune to, so for these, you use Headlong Rush. Protect is used for when Indeedee's is setting up Trick Room, so you guarantee the enemy team isn't oneshoting Ursaluna. Tera Normal is the perfect fit for this Pokémon due to it still holding it's Ghost immunity and, since it's always paired with Indeedee, Fighting-types aren't an actual menace.
PORYGON2
Tera Ghost; Eviolete; Download
Relaxed nature
EVs - 252 HP, 172 Defense, 84 Special Defense
IVs - 0 Speed, 0 Attack
Ice Beam
Thunderbolt
Trick Room
Recover
Porygon2's primary role is to be a mid-match Trick Room setter, as Indeedee's most likely will faint. Paired with Incineroar, who's purposeful slow, it's also good to have Thunderbolt to deal with Water-types and Ice Beam to threat Ground-types, which Incineroar is weak against. Porygon2's can also be used as an early-match Trick Room setter, in case Indeedee's faints before she can set up Trick Room. Tera Ghost is used for it to lose it's Fighting weakness, as Incineroar, the usual Porygon2 partner, is also weak to it; however, Incineroar makes up for the Ghost-type weaknesses that comes with the Terastalization, since it can learn strong Dark-types moves such as Knock Off and Throat Chop, and Fighting-type moves like Close Combat
INCINEROAR
Tera Ghost; Heavy-Duty Boots; Intimidate
Careful nature
EVs - 252 HP, 96 Defense, 160 Special Defense
Fake Out / Close Combat
Flare Blitz
Knock Off / Throat Chop
Parting Shot
Incineroar's role is mainly to be a chipping Pokémon with Fake Out and Knock Off to abuse oposing Pokémon, slowly and steadily defeating 'em. You can also use it's Parting Shot to switch up with Ursaluna or Ogerpon, using him in a hit-and-run way. It's Tera Ghost nullifies it Fighting weakness, making Incineroar immune to it, as well as neutral damage to Water, Ground and Rock. Knock Off can deal with oposing Ghosts, and if you don't feel safe against the Dark-type Pokémon, you can use Close Combat instead of Fake Out for coverage. I personally don't because most of the time I terastalize Ursaluna.
OGERPON-CORNERSTONE
Tera Rock; Cornerstone Mask; Sturdy
Jolly nature
EVs - 252 Attack, 4 Special Defense, 252 Speed
Ivy Cudgel
Power Whip
Follow Me / Swords Dance
Spiky Shield
Ogerpon's role in this team is to be a cleaner, being a fast physical sweeper, Ivy Cudgel can deal massive damage, and Power Whip grants a grass coverage against Rock and Ground types. Follow Me is the to-go in case you want to protect some other team member, but you can switch it for Swords Dance to increase it's sweep capabilities even further alongside the help of Amoonguss' Spore. Spiky Shield is here to check opponentes, seeing if they outspeed you or have priority moves.
AMOONGUSS
Tera Water; Sitrus Berry; Regenerator
Calm nature
EVs - 244 HP, 208 Defense, 56 Special Defense
IVs - 0 Attack, 28 Speed
Spore
Rage Powder
Pollen Puff
Clear Smog
Amoonguss is the wall of the team. While Ursaluna has a good bulky, it's designed here to hit hard, while the fungus is a sponge, redirecting hits with Rage Powder, allowing Ogerpon to keep it's Sturdy ability; if you want a complete turnaround, you can also start the match with Amoonguss and Indeedee/Porygon2, due to it's incredible bulky paired with Regenerator and Rage Powder. Amoonguss can also be a support for Ursaluna, due to it's Pollen Puff ability, and counter to oposing Intimidate users with the move Clear Smog. Spore is the perfect option if you are running a Swords Dance Ogerpon, or if you want to sweep with Incineroar's Flare Blitz / Ogerpon's Ivy Cudgel.
