what's a good moveset for sceptile?

try

leaf blade - high critical hit ratio

x-scisor - good bug move

earthquaque - hits all and makes up for it's fire weakness

and

you might choose one of these

fury cutter - increases power in each succesive hit

solar beam - good, but has to charge up first

slam - not very good, but for sceptile is ok

dragon claw - adds to it's strengts against dragons

or

quick attack - to overcome in speed

this is just an opinion, you have to decide which moves are better for your pokemon, oh and i'm talking about the diamond and pearl games, sorry if you're asking for the previous versions