Balance Patch
Starting off we have three Trainers that are in need of some changes.
Mina
Your Pokemon are immune to the secondary effects of moves. Your Pokemon can't have their Speed lowered by an opposing Pokemon. ->
Your Pokemon are immune to the secondary effects of moves and take 0.9x damage from moves with secondary effects.
Mina has been a rather weak trainer that struggles to consistently provide a solid effect. You need to rely completely on what the opponent is bringing. Are they running Discharge? Good. Thunderbolt? Not good. Adding a small defensive boost against moves with secondary effects allows your Pokemon to better resist common moves (mainly special moves). This allows Mina to do more than block Discharge and 10% chances to do things.
Lacey
Your Fairy and Ground-type moves ignore abilities as if you had Mold Breaker. ->
Your Fairy and Ground-type moves ignore abilities and stat changes as if you had Mold Breaker and Unaware (only offensively, not defensively).
Lacey is another trainer that struggles to get reliable use from her ability. You're basically fishing for Stall to break through Unaware, Hatterene to freely set Spikes, and a couple few niche Levitate mons. Allowing your moves to hit through stat changes allows your mons to nuke Zamazenta through Dauntless and various BU or CM mons through their boosts. These changes make Lacey much more reliable, though still has matchup problems. However, hitting Zamazenta (one of the tier's strongest mons) harder is really nice.
Marshal
Your Pokemon ignore Burn's Attack drop. ->
Your Pokemon ignore Burn's Attack drop. Your Pokemon ignore the negative effects of contact moves (except Pickpocket and Brycen-Man).
Marshal feels like a trainer that is really only good on a team spamming physical attackers, but struggles facing teams without Moltres or Wisp Pult because not every team spams Burn. While a useful effect, it struggles to do enough to justify on most teams. Allowing your mons to ignore contact effects is a major boon. Rocket Helmet, Zapdos, and Moltres all range from extremely common to still very good options. Completely ignoring some of the major parts of these effects is massive. This trainer is also the biggest middle finger to Moltres.
Vetoes
Name: Viola
Effect: When one of your Bug-type Pokemon enters battle, Sticky Web is set. Unlike the move, this Sticky Web only lasts for five turns.
Description: References Viola's Sticky Web strategy in the anime.
Viola: This is going to be
vetoed for providing too big of a benefit to Bug-types. Make it once per Bug Pokemon and it should be fine.
Name: Clemont
Effect: Your Electric-type STAB restore your HP equal to half of the damage dealt.
Description: Clemont's ace is Heliolisk and he (technically) owns a Dedenne, both of the associated users of Parabolic Charge. [I know Miraidon is the other learner, but how many Miradon you know actually use it? Technically, it also fits with Clemont's "The Future is now" catchphrase]
Name: Melony
Effect: The duration of Snow is extended by two turns. Whenever Snow becomes active, an Aurora Veil is also set up on the setter's side of the field on the same turn.
Description: References the effect of G-Max Resonance, Gigantamax Lapras' signature G-Max move. The extended duration of Snow is a reference to her Sync Move one liner "an Ice Age is looming!" and is a counterpart to our Steven.
Name: Koga
Effect: Your moves that would poison the target instead inflict bad poison. The priority of your Poison-type moves is increased by 2.
Description: Koga's schink is Toxic spam, and he will spam it.
Clemont: This is going to be
vetoed for providing too much longevity to electric-types. Nerf it to 1/3 or 1/4 and it should be fine. It'd recommend 1/4 as 1/3 is a lot of healing. Zapdos doesn't need giga drain healing on Volt Switch.
Melony: Holy
vetoed. There is no way you are getting free screens. Remove the free Veil setting and just keep the Snow extension. Maybe give it another small benefit. A SMALL benefit, please.
Koga: You do not get Super unnerfed Gale Wings on all Poison moves. Super
vetoed. Rework the sub completely. The first effect is way too weak to see any real play. The second effect is far too strong. Putting that on any offensive move is broken and putting it on only Poison Status moves is mediocre and outclassed completely by Miriam. Try making Poison trainers different from Miriam.
Name: Ryme
Effect: Your Pokemon's Sound-Based moves 90 BP and under become Ghost-Type and have 1.2x power
Description: Her ace is a Toxtricity that can Tera into the Ghost-Type. Gives coverage to certain mons and makes certain Ghost Pokemon hit with more of an Oomph (Zoroark-H, Gengar, you could probably argue Skeledirge if you wanted to run Ghost Torch Song over Hex too, etc).
Name: Ash
Effect: Your Electric-type Pokemon can hit Ground-types with Electric attacks for not very effective damage. One NFE-tiered Pokemon on your team can hold the Light Ball for its boost, even if it's not a Pikachu.
Description: Ash's Pikachu is known for doing feats impossible in the games, such as taking down Blaine's Rhydon with a well-placed Thunderbolt to the horn. And Light Ball is an Pikachu-exclusive item that could see use on a team.
Ryme: This is
vetoed. This is super weak and steps on the toes of Roxie. Why are the mons listed for running this UU, RU, and RU. Two of them take their best STAB for one type and turn it into Ghost-type. Zoroark-Hisui wouldn't want to run this because it would loose its only Normal STAB except freaking Tera Blast. Gengar is too niche to run and doesn't get a sound move? Why was this suggested as running this? Skeletdirge running Ghost Torch Song is the best user of this, and that's still niche. The other use of this would be Clefable, Kyurem, Raging Bolt es cue mons to use as strong coverage.
Ash: The first part is fine. The second part is one of the most broken trainers to ever have been submitted and is
vetoed. Remove the second part and it should be fine.
Name: Lt. Surge
Effect: All originally electric Pokémon cannot have their items removed, and take damage as if they are itemless.
Description: Can turn defensive electric types like Zapdos and Iron Hands into stronger defensive pokemon with Knock absorbtion, and allows offensive mons to switch-in without losing a choice item or boots. References static electricity making things stick to each other and all of Lt. Surge's Kanto Pokemon having Static as their ability.
Name: Pryce
Effect: Thick Fat Pokémon are immune to Fire and Ice moves.
Description: Practically, the only two quasi viable Thick Fat Pokémon are Ice type (Azumarill does not count), and Pryce's team consists exclusively of Pokémon that can have Thick Fat as their ability. Allows Mamoswine and Cetitan to have nieches with their extra defensive utility, Cetitan becomes a Belly Drum sweeper which does not fear a burn and gains good set-up opportunities, while Mamoswine's already good offensive pressure can be exploited as a wallbreaker with free switches. Ironically, makes a team's Kyurem match-up far better.
Lt. Surge: This is fine if "take damage as if they are itemless" means Poltergeist immunity and Knock doesn't get a boost. I got confused reading this at first, but I assume this is what you mean.
Pryce: This stretches the slate restriction too much and gets
vetoed. Thick Fat is not associated with the Ice-type enough to count. Also this effect is extremely weak, and would be vetoed in that department as well.
Name: Gaeric
Effect: If a Pokémon is frozen, it loses 12.5% of its max HP per turn and moves targeting it can't miss, but they can freely attack. Moves with a freeze chance used by your Ice-types now have a 20% chance to freeze the foe.
Description: References how freeze is replaced with a new status in Legends: Arceus, where Gaeric comes from, and his team of Ice-types. This replaces the uncompetitive aspect of freeze and replaces it with an effect that still makes Ice-type moves scary to switch into, but instead of not being able to move, they take a bunch of chip damage a la poison and they can't dodge any attacks. Freeze otherwise works the same, so mons still have a 20% chance to thaw out every turn to avoid the chip damage. Ice-types also get special treatment, with their moves having double the chance to set this basically new status and you can even Tera into Ice to get this benefit.
Name: Bugsy
Effect: U-turn deals double damage when not very effective when used by your Bug-type Pokemon. This doesn't stack with the ability Tinted Lens.
Description: References Bugsy's shockingly terrifying U-turn Scyther in HGSS. U-turn is a broken move as we all know and the best thing that Bug-types have contributed to Pokemon, but they usually aren't the best users of the move. Giving them a pseudo-Tinted Lens effect on their U-turns makes them a lot scarier, as one of the balancing factors on the move is the many types that resist Bug. This makes stuff like Scizor and Slither Wing much more effective offensive pivots and maybe makes the rare Tera Bug appealing on U-turn users since the move becomes so clickable.
Gaeric: Not necessarily a veto, but this seems rather weak. Blizzard sounds better with the no miss part, but your only chance to freeze is by spamming a 20% chance effect. This sounds rather weak, especially since they can still thaw out. Provide a better way to freeze or make it more reliable somehow. You don't have to, though. You can keep it how it is if you really want.
Bugsy:
Make is stack with Tinted Lens.