Can Eevee evolve in Pokemon Mystery Dungeon explorers of time?

yes you can, but you have to get the item necessary first and you have to have beat the game. as in, you have to get back from the future, graduate from the guild, and so on. but yes, you can evolve eventually. i know this because i have it to and i' m the eevee on my team and i evolved me into a vaporeon, but that's because my partner is a pikachu. you need the solar ribbon and high IQ stars to evolve into espeon, the lunar ribbon and high IQ stars to evolve into umbreon, the fire stone for flareon, the water stone for vaporeon, the thunder stone for jolteon, frozen rock for glaceon, and the mossy rock for leafeon.