I'd go with
4 Rainbow
4 Grass (maybe less, idk)
and possibly a couple Psychic.
and for trainers... it should be a fairly regular list.
3x Collector
4x Communication
2x PONT
2x Judge
2x IQ
3x PlusPower
2x Reversal
2x Dual Ball
2x Junk Arm
could be a starting point. Some of the stuff is a bit iffy (not too sure about IQ, or PlusPower, but then I've never played or tested with a HGSS-format. This is all basically guesswork), but it should work as a backbone.
4 Rainbow
4 Grass (maybe less, idk)
and possibly a couple Psychic.
and for trainers... it should be a fairly regular list.
3x Collector
4x Communication
2x PONT
2x Judge
2x IQ
3x PlusPower
2x Reversal
2x Dual Ball
2x Junk Arm
could be a starting point. Some of the stuff is a bit iffy (not too sure about IQ, or PlusPower, but then I've never played or tested with a HGSS-format. This is all basically guesswork), but it should work as a backbone.