>>55124228Why should Tinkaton have a drawback on her special item? Marowak and Farfecth'd don't have any drawbacks on theirs except getting them Knocked-Off which would be the same drawback for Tinkaton, she shouldn't be punished for using the boosting and be punished for losing the boosting item logic it's not like she has an extra item slot like a Pokémon with built in Huge Power and needs to be nerfed for it.
I know you're thinking about balance reasons, but simply getting her item Knocked-Off is balanced enough, she won't be as broken as something like Bloodmoon Ursaluna who gets to have free everything with the only drawbacks is Bloodmoon doesn't SE and it can't be used twice in a row, but as you can see, they didn't nerf it's Spec.ATK for "balance" like they did with Tinkaton and it can learn Calm Mind while still being able to learn most of the Original Ursaluna movepool on top of that while also being extremely Tanky.
>>55124298Another option is to let her learn all of the Hammer moves because they pretty much turned them into literal Hammers made of Energy now, and since they're actual Hammers just made of Energy, the Hammer Pokémon who is a Magical Fairy should be able to use those Energy Hammers, then they can make new Hammer moves that is learned by Pokémon who uses Blunt Weapons(Conkeldurr, Tinkaton, Marowak) similar to how Crab moves are learned by Crustacean Pokémon.