I have a plan to check a speed boosted Deoxys. Unfortunately it is a bit convoluted and requires a few specific pokemon.
Fainted sync in front.
Second Accelgor. Level 70 naive, move Final gambit. Stats HP 193, SpD 108, Sp 294. I get these with IV HP 0, SpD 31, Sp 31 and EV HP 8, SpD 56...