Your ideas for new Abilities.

Suppression - when meeting a oponents pokemon in battle the user causes to disable the oponents strongest move for 3 turns before they exchange their respective moves. (good for ghost, psychic, electric, imagine you battle a Talonflame with Flare Blitz and Brave Bird, that both moves have 120 power and are it's strongest ones, then both moves would be disabled for 3 turns)

The same effect could be done as a status move or a damage dealing move with 30% chance of this occuring. Blocking the oponents strongest move before it could be even used would make strategical sense. Could see sound, electric, ghost and psychic and fairy getting this kind.__

Soul Wall- after fainting the user leaves a barrier for 5 turns that reduces all damage by 50% and heals pokemon on its side by 1/8 hp every turn.__