I am gonna have some fun. I am submitting Jirachi as an
unconventional pick.
Jirachi @ Leftovers
Calm Nature
Ability: Serene Grace
EVs: 248 HP / 8 Def / 252 SpD
- Wish
- Psych Up
- Stored Power
- Calm Mind/Other options
+1 0 SpA Eternatus Dragon Pulse vs. 248 HP / 252+ SpD Jirachi: 68-81 (16.8 - 20%) -- possible 7HKO after Leftovers recovery
+6 0 SpA Eternatus Dragon Pulse vs. 248 HP / 252+ SpD Jirachi: 181-213 (44.9 - 52.8%) -- guaranteed 3HKO after Leftovers recovery
+1 0 SpA Jirachi Stored Power (280 BP) vs. +6 176 HP / 240 SpD Eternatus: 186-222 (40 - 47.7%) -- guaranteed 3HKO after Black Sludge recovery
0 SpA Jirachi Stored Power (260 BP) vs. +6 176 HP / 240 SpD Eternatus: 116-140 (24.9 - 30.1%) -- 0.2% chance to 4HKO after Black Sludge recovery.
The last move slot can be anything. Calm mind to Sweep, Shadow Ball to hit oppositing psychic types, or... Just put whatever.
Thanks to its typing, access to Psych up, stored power and recovery, Jirachi can comfortably come in, copy the boost, and use stored power. Inspired by some HO sets. However, without the defense boost, does not match well against other, bar Mewtwo. It is just for fun.
I originally planned for metagross