>>48239278Clefairy was going to be the mascot iirc, but they went with pikachu as they felt clefairy would be too girly.
>>48239273Mew is a good choice but similarly to clefairy, would seem girly.
>>48239353Eevee would be a top choice, for the reasons you mentioned. My moms fave pokemon was eevee.
I would personally go with Rydon as it was the first pokemon ever designed. I believe pic is the first ever released "pokemon" art.
But any of the gen 1 starts and their evos work as well. Squirtle/Ivysaur/Charizard are perfect in smash bros as a trio.
Something like Machop could work as well. The anime would be more battle-focused though.