>>58437811
A lot of the Megas do go violent and radical mutations when they Mega evolve, but then you have stuff like Mega Slowbro, Audino, Altaria and most of the Mega starters too that just get empowered.
>>58438015
I have a working theory Medicham is the waifumon of someone at Gamefreak and he really wanted to see the belly dancer inspiration coming through harder with a Mega, also it has a stand, because Japs love their references.
>>58438530
It's even brought up in the Pokedex, Mega Slowbro becomes a lot more MOTIVATED due to Shellder's poison affecting all it's body, it's also why it doesn't get Regenerator as a Mega too, Shellder's toxins are affecting it way too much for it to heal naturally.