Just made it to Blackthorn in Crystal. Currently just training up Manny the Swinub. Gonna wait a while before challenging the Gym, will just go around enjoying all the side content, do some trainer rematches, get all the Evo Stones, catch all the Swarm Pokémon, maybe do the Ruins of Alph. I love the slow-paced gameplay of Johto. It really isn't the same when you just rush through it.