>>57336001honestly, anon, you've got 2 grass types (one with poison, one with ice), a normal type, a bug/flying type, and a water/ground type. what I'm seeing here is quite large weaknesses to flying and fire, both of which can be covered by a rock type, so I would suggest one of those,
..if you could find one, of course. it would also give a larger weakness to water, but you have gastrodon, so I assume you have water absorb.
..but honestly, getting rid of your starter is a sad choice unless you chose a different pokemon to be it.