We already have some one who has Eevee but I can't stop you having Eevee so if you want it you can have it. With theire Eevee, they gain the powers of the nearest person to them if they are similar to one of the Eeveelutions powers.
Sorry there is a bit of a problem letting you have Mew, as I have already asked someone else to take ledgenadries off thier SU. But if you really wanted you could have Smergle and copy someone's shapeshiting power and levitation and psychic powers etc. until you have three powers you like. you can decide to accept smerle, eevee, ditto or try to convince me to let you have Mew it's up to you.