Sixth Pokemon for My Kanto X Alola team

#1
Hi, I need help with my team, I don't know what pokemon to add to complete it. Also should I run Z-Smart Strike or Z-Sacred Sword on my Kartana? Here is my team so far:

Togedemaru w/ Assult Vest
Nickname: Mr. Prickles
Ability: Lightning Rod
EVs: 248 HP / 252 Def / 8 Sp. Def
Careful Nature
- Zing Zap
- Poison Jab
- U-Turn
- Nuzzle

Mimikyu w/ Life Orb
Nickname: Ragamuffin
Ability: Disguise
EVs: 252 HP / 252 Atk / 4 Spe
Adamant Nature
- Shadow Sneak
- Play Rough
- Leech Life
- Swords Dance

Toxapex w/ Black Sludge
Nickname: Fort Tox
Ability: Regenerator
EVs: 252 HP / 252 Def / 4 Sp. Def
Bold Nature
- Scald
- Toxic
- Recover
- Haze

Tapu Bulu w/ Choice Scarf
Nickname: Bullhardt
Ability: Grassy Surge
EVs: 4 HP / 252 Atk / 252 Spe
Hasty Nature(Ingame nature, can't be helped)
- Wood Hammer
- Superpower
- Stone Edge
- Horn Leech

Kartana w/ Z-?
Nickname: OrigamiBoi
Ability: Beast Boost
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Leaf Blade
- Smart Strike
- Sacred Sword
- Defog

That is my team, feedback would be great and please provide sets for sixth pokemon. Thank you ;)