Thanks! I'm glad you liked it.
And yeah, I like that instead; there could be an "Altering Daycare" (bad name, but...best I can think of), maybe on its own island. The island could be massive, having a large area with each climate, and a receptionist at each one allowing you to deposit two Pokemon at a time.
Maybe by these "Altering Daycares" you could only alter resistances, tinting the Pokemon. But you can also breed in these environments, and a Pokemon bred in an environment would be different depending on the environment born in--if in a snowy, polar climate, it would be born as an Ice Type.
Also, to allow a complete change in type or a creation of a Dual-Type, there could be possibly unlockable sections that would cause those changes. Obviously, there would be quite a few...so I have no clue how it would be able to occur, but that's just a concept. Again, same concept, except I'm not sure about the resistances. Perhaps there could be dual-resistances as well?
In these environments, you could, as you said, interact with your Pokemon--perhaps you could press A (or whichever button is the "talk" button) to view the Pokemon and see a gauge or something, indicating how affected the Pokemon has been. There's an idea--perhaps it can only receive a certain level of resistance, and only two different types--but you could even it out how you wish, adding more of a resistance to a certain type which would be more advantageous to be resistant to. Obviously, the longer you leave a Pokemon in the environment, the more resistant they become. In a dual-type environment, the levels would remain completely equal to each other.
Well, it's sort of mine, but I wouldn't have anything without your initial ideas. Again, though, I'm glad you like it.