What it does
The user restores 1/2 of its maximum HP, rounded half up. If the user is not Terastallized, until the end of the turn Flying-type users lose their Flying type and pure Flying-type users become Normal type. Does nothing if the user's HP is full.
Who carrys it
12 of the 277 Pokémon measured on the
Regulation M-B ladder carry Roost.
The one that matters most is Mega Charizard Y,
which is on 26.5% of teams and carrys it on 0.3% of its sets.
The full list is above, ordered by how much of the format each one is.
What it hits
As a Flying move it is super effective against Bug, Fighting and Grass, resisted by Electric, Rock and Steel.
4 other Flying moves appear in this format: Tailwind, Dual Wingbeat, Brave Bird, Hurricane.
Who could and does not
26 Pokémon legal in this regulation can learn Roost at all,
against the 12 that actually bring it. The gap is the interesting number: it is
the set of Pokémon that have the option and decline it.
The most-played of those are Pelipper, Dragonite, Vivillon, Aerodactyl, Talonflame and Hydreigon — each of them measured on the ladder, each of them leaving this move on the shelf.
How concentrated it is
Across the ladder, Roost accounts for an expected
0.10 of the six slots on an average team, which makes it the
51st most-brought of the 121 moves this format runs.
1% of that comes from Mega Charizard Y alone, so it is spread across the field rather than propped up by one Pokémon.
Its carriers are mostly Flying (7), Steel (4) and Dragon (3).
Where these numbers come from
Usage is Smogon's published statistics for the Regulation M-B VGC ladder, and the description is
the one shipped in the Pokémon Showdown data set. Both are regenerated on every build rather than
written by hand, so this page follows the format instead of trailing it. Take any of it to the
team builder or the damage calculator.
Mega Charizard Y
26.5%
0.3%
Mega Staraptor
16.5%
48.4%
Corviknight
2.3%
41.8%
Scizor
0.95%
1%
Altaria
0.82%
49.4%
Mega Charizard X
0.49%
6.1%
Mega Drampa
0.27%
3.7%
Skarmory
0.25%
8.6%
Empoleon
0.15%
6.1%
Mega Hawlucha
0.10%
4.7%
Mega Pidgeot
0.10%
0.3%
Decidueye
0.04%
2%