Hey guys, filthy casual here. I got a rom for pokemon black that i play on my phone. I'm at castelia city and a guy is asking which stone I want to evolve my monkey bro. Thing is I dont give a shit about the panbros, but whats a cool/good pokemon I can get later on or at some point in the game that i can use one of the rocks to evolve? Aside from eevee, cos i only want jolteon from him.
Exeggutor? open to suggestions, thanks!

ps I'm aware most of these guys aren't attainable until later in the game, but i dont want to evolve my panpour.