Enderwither02
Spazmatism
There seems to be one for almost every generation, with Gen 2 having Marill (it had a placeholder name of Pika-Blu, so I guess it counts?), Gen 3 having Plusle and Minun, Gen 4 having... actually, I don't think Gen 4 had any... Gen 5 had Emolga, Gen 6 had Dedenne, and now Gen 7 gets a literal Pikachu clone, Mimikyu.It is supposed to be a joke I believe, Game Freak is laughing at themselves because of the Pika Clones they have, such as Emolga, Pichu. and Minun/Plusle,