They can be rewards for missions or buy them at Kecleon shops in Mystifying forest for a lot of Poke so bring a pure seed and steal them.
There are a few new dungeons and some new starter pokemon, such a Riolu, which is a good one to play as.
you cant
there are no floors, just one, you can only evolve pokemon there
In Pokemon: Mystery Dungeon Explorers of Time/Darkness, Moon Stones can be found rarely in Kecleon Shops for 2000 Poke.
In Explorers of Darkness you can get it as an occasional reward for completing a job. And in Explorers of Time, you can't get it, and have to get wondermail to get this reward.
wonder mail
kecleon shop
receive a thunderstone and when it asks if you want to use anitem say "yes" and then choose thunderstone
Pikachu+Thunderstone=Raichu Eevee+Thunderstone=Jolteon These are the only 2 pokemon that evolve with the thunderstone in pokemon emerald
Win the pokeathlon afew time then use the points to buy a thunderstone from the prize corner
Any Pokemon that has an evolution can evolve. Some Pokemon may need some sort of item like a Thunderstone to evolve, though.
You have to buy it in a shop
In Pokemon Mystery Dungeon Explorers of Time it is impossible to get Mewtwo. You are only able to get it in Explorers of Darkness.
you can but, only on certain pokemon ex: pikachu+thunderstone=Riachu voltorb+thunderstone=nothing but wasted time
i don't think your Pokemon evolve at all in Pokemon explorers of time.
Tynamo will evolve into Elektrik will evolve into Elektross with a thunderstone in Pokemon White.
You can use a thunderstone on pikachu