Is there a pokemon that you have in your party for every game?

Hello reddit community, I was wondering if any of you have a single pokemon that you have in your party every game? Mine would be any of the eons a.k.a. the eeveeloutions. They have been in the game since pokemon silver I think and they are so cute! I would like to know what is a pokemon that's in your party every pokemon game and tell me why. (Btw i have a new community called Pokemon_lore check it out!)