Mega planner

Which Mega should someone bring for the group?

A Mega does two jobs at once: it fights, and its aura multiplies every ally's damage by 1.3 on a move matching one of its own types and 1.1 on everything else. So the figure to rank on is the whole lobby's damage, not the Mega's. Both halves below are measured with the raid simulator, not assumed.

Raid bossTierAttacker levelIVsWeatherFriendshipMegas to show

Someone should bring Mega Mewtwo Y

A lobby of Mega Mewtwo Y plus five Mewtwo does 322 damage per second, +35.7% more than six Mewtwo with no Mega at all. Its aura alone adds +27.8% to each ally, and the Mega itself does 75.3% more damage than the counter it replaces. It is also the hardest-hitting Mega here, so there is no trade-off to think about.

Machamp · Tier 3

fighting

Weak to

flyingpsychicfairy

Reference counter: Mewtwo
Its DPS unboosted: 39.5
Baseline lobby DPS: 237

Ranked by what the whole lobby does

Scroll sideways for the Mega's own numbers.

Megas ranked by lobby damage per second against Machamp
#	Mega	Types	Lobby DPS	vs no Mega	Aura on allies	Its own DPS	Its solo time	Aura lands at
1	Mega Mewtwo Y Psycho Cut + Future Sight+	psychic	322	+35.7%	+27.8%	69.3	0:53	1.3x on Psystrike
2	Mega Mewtwo X Psycho Cut + Psystrike	psychicfighting	306	+28.9%	+27.8%	53.2	1:09	1.3x on Psystrike
3	Mega Alakazam Confusion + Psychic	psychic	293	+23.6%	+27.8%	40.6	1:29	1.3x on Psystrike
4	Mega Delphox Zen Headbutt + Psychic	firepsychic	292	+23.1%	+27.8%	39.5	1:34	1.3x on Psystrike
5	Mega Malamar Psycho Cut + Psybeam+	darkpsychic	291	+22.9%	+27.8%	39.0	1:36	1.3x on Psystrike
6	Mega Latios Zen Headbutt + Psychic	dragonpsychic	291	+22.7%	+27.8%	38.5	1:35	1.3x on Psystrike
7	Mega Gallade Confusion + Psychic	psychicfighting	291	+22.6%	+27.8%	38.3	1:35	1.3x on Psystrike
8	Mega Gardevoir Charm + Psychic	psychicfairy	290	+22.2%	+27.8%	37.4	1:37	1.3x on Psystrike
9	Mega Metagross Zen Headbutt + Psychic	steelpsychic	287	+21.1%	+27.8%	34.7	1:45	1.3x on Psystrike
10	Mega Latias Zen Headbutt + Psychic	dragonpsychic	286	+20.5%	+27.8%	33.2	1:50	1.3x on Psystrike
11	Mega Starmie Psywave + Psychic	waterpsychic	286	+20.5%	+27.8%	33.2	1:51	1.3x on Psystrike
12	Mega Slowbro Confusion + Psychic	waterpsychic	280	+18.3%	+27.8%	28.1	2:09	1.3x on Psystrike
13	Mega Medicham Psycho Cut + Psychic	fightingpsychic	278	+17.1%	+27.8%	25.1	2:27	1.3x on Psystrike
14	Mega Rayquaza Air Slash + Dragon Ascent	dragonflying	270	+13.9%	+9.6%	53.5	1:11	1.1x on everything
15	Mega Staraptor Wing Attack + Brave Bird+	fightingflying	260	+9.7%	+9.6%	43.5	1:23	1.1x on everything

How this is worked out

The reference counter is Machamp's best non-Mega attacker from the usual ranking (Mewtwo with Psycho Cut + Psystrike). Each Mega gets its own best moveset from the same deterministic pass rankAttackers uses, then a 6-run Monte Carlo for its own DPS; the aura is measured by re-simulating the reference counter with activeMegaTypes set to that Mega's types — the same control /raids exposes as "Mega aura in the lobby", and cached per distinct type set so 61 Megas cost about twenty measurements. Lobby DPS is then the Mega plus five boosted allies. Two things it deliberately does not model: the Mega's own damage is not boosted by its own aura (Megas do not boost themselves, and the engine enforces that), and a party of six is assumed rather than the mixed lobby a real raid has — so read the percentages as a ranking, not as a promise about your particular group.