There are only 2 Drastically Raising moves-
- Cotton Guard (+3 defense)
- Tail Glow (+3 sp.attack
There is also Quiver Dance, Shell Smash, Shift Gear, Coil which raise a total of 3 stages but in different stats.
You can also use X Attack 3 which raises by 3 levels (drastically) or X Attack 6, which raises all he way to the top with 6 levels (immensely).
Of course, this goes with X Special Attack and all the other stats.
Sorry MewC i copied some of your answer
Hope this helps =P