Futachimaru has appeared in very few Pokémon Center Collections, surprisingly only three that I know of - one of which came out during the X&Y era - very surprising! Middle evolutions of starters barely get attention in merchandise anyway so it's a good thing he showed up on anything at all!

 

I've got a separate page for every Pokémon Center Collection featuring Futachimaru, listed chronologically from earliest to latest, so click any of the links below to be transported! Also, if you feel that an older collection fits my criteria let me know! I may have either glossed over it, or there may be a particular reason why I don't have items from it.