This one wasn't a doodle, it was just me putting out there a massive missed chance we had during XY (considering Ash has crossdressed in every other season anyways so).
An episode about Serena!Ash would be like, Ash entering a contest of "imitating someone else!" under certain given condition, for which the prize is a free pass for an all-you-can-eat buffet. His condition was to imitate "someone pretty and stylish", and he delivers :3c Braixen was, surprisingly, very into it too.

Not sure Serena's heart can take it all but well, equivalent exchange ¯\_(ツ)_/¯

F2U BULLET | PKMN Pokeball (v2)  Ash!Serena Card

Bullet; Purple

On my Tumblr
Bullet; Blue

On my Twitter
Bullet; Orange

On my Instagram

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Bullet; Red Pokemon ® Nintendo / GameFreak / Satoshi Taijiri
Bullet; Pink Art ® NoVaNoah