Onto the team itself, 6 standard pokemon, 3 standard sets.
Leech Seed is not useful in RBY; Reflect isn't passable. All in all, should consider Hypno if that's the set you want. Stalling in RBY is a bad idea though.
Reflect on Chansey is a bad from experience; I'd personally go with S-toss here, but people like Tbolt (which literally hits nothing past Starmie... and the occasional Lapras), go figure.
Go back to Tobybro.