Pokémon Champions Regulation M-B: Type Matchup Planning Guide

Pokémon Champions Regulation M-B Double Battles is the newest official competitive focus, and Pokémon.com's July 24 strategy overview highlights a format shaped by new Mega Evolutions, weather teams, and flexible balance cores. Identify the defensive pressure your six Pokémon share before deciding that a powerful Mega Evolution or weather setter belongs on the team. Read the official Regulation M-B overview.

What the official overview confirms

Pokémon.com says Regulation M-B adds new Mega-Evolved Pokémon and describes several prominent approaches: sun teams around Mega Charizard Y or Mega Pyroar, snow teams with Mega Froslass, sand teams including Mega Tyranitar, rain builds featuring Mega Swampert, and setup or control options such as Mega Delphox, Mega Blastoise, and Mega Gengar. It also notes that weather control can change mid-battle as a Mega Evolution activates or another effect replaces the current weather.

These examples are not universal recommendations. Use the official article for format context, then use the standard chart to see whether your group can answer the types likely to pressure it. The dedicated Pokémon Champions type chart explains the site’s baseline matchup rules.

Regulation M-B matchup map

This table is a quick visual starting point for the broad type questions raised by the official archetypes. It lists standard defensive weaknesses, not movesets, damage calculations, or complete counter lists.

Officially discussed direction	Typing to inspect first	Standard attacking types to check	Important planning question
Mega Charizard Y sun	Fire/Flying	Water, Electric, Rock	Does the team have a safe answer to Rock pressure while keeping weather control?
Mega Froslass snow	Ice/Ghost	Fire, Rock, Ghost, Dark, Steel	Can the partner core cover Fire and Dark attacks after snow is replaced?
Mega Tyranitar sand	Rock/Dark	Water, Grass, Ground, Bug, Steel, Fairy, Fighting	Are Fighting and Ground weaknesses duplicated across the six slots?
Mega Swampert rain	Water/Ground	Grass	Is there a plan for a Grass attacker without treating the 4x weakness as the whole game?
Mega Delphox setup	Fire/Psychic	Water, Ground, Rock, Ghost, Dark	Which teammate absorbs the opponent’s strongest Dark or Ground pressure?

For an exact baseline, open the home-page type matchup calculator and select the defender’s two types. Compare another candidate in the dual-type calculator instead of relying on memory—especially when one type creates a 4x weakness or an immunity.

Build the weather core, then test its coverage

Weather is a major Regulation M-B theme because the official overview names sun, snow, sand, and rain as viable directions. A good type-chart workflow begins with the weather centerpiece, but it should end with the other five slots.

For example, Mega Charizard Y’s Fire/Flying typing is weak to Water, Electric, and Rock in the standard chart, while it resists several types that can make it attractive beside a sun core. That is only the start. A Rock attack is a 4x standard weakness, yet the turn’s target, attack availability, speed, weather, item, and partner can make the board state very different from the chart alone.

Similarly, Mega Swampert’s Water/Ground typing gives it a single standard weakness—Grass—but that weakness is 4x. When adding rain partners, ask whether they punish Grass attackers, can reposition safely, or create the same secondary weakness. The Water/Ground combination page is useful for that focused check, while the Grass type guide shows the attacking side of the interaction.

Use a six-slot weakness audit

The official overview repeatedly describes pairs and supporting cores rather than isolated Pokémon. That is the right mindset for type planning: do not merely add one answer to each threat; look for repeated liabilities across the whole selection.

1. Add the intended Mega Evolution and weather setter first.
2. Check every member for shared standard weaknesses, especially Ground, Fighting, Rock, Water, and Grass when those types overlap with the core.
3. Mark resistances and immunities, then ask whether those answers can enter the field safely in a Double Battle.
4. Review actual moves, Abilities, weather interactions, and speed control after the chart has revealed the pressure points.

The team weakness calculator makes that audit faster by showing repeated weaknesses, resistances, and immunities across six defensive typings. It cannot evaluate every Champions mechanic, but it is a clear way to catch a coverage problem before investing time in a full battle plan.

What this guide does not claim

Pokémon.com's overview reports the current Regulation M-B landscape and gives official examples of successful ideas. This guide does not turn those examples into guaranteed rankings, exact win rates, mandatory movesets, or a prediction for the next tournament. It also does not assume that a standard type advantage overrides an Ability, weather effect, item, move choice, target selection, or teammate support.

Use the chart to frame the question, validate the live format details in Pokémon Champions, and adjust after real Double Battle experience. That approach keeps the fast, reliable part of type planning separate from the facts that only the actual battle can settle.

Pokémon Champions Regulation M-B FAQ

What is Pokémon Champions Regulation M-B?

Regulation M-B is the current Pokémon Champions Double Battles regulation discussed in Pokémon.com's July 24, 2026 strategy overview. It introduces new Mega-Evolved Pokémon and features several weather and balance archetypes.

Which type matchups should I check for Mega Charizard Y teams?

Start with Fire/Flying: Water, Electric, and Rock are super effective in the standard chart, with Rock dealing 4x damage before other battle effects. Then check the actual moves, Abilities, weather, items, and partners in your battle.

Does a type advantage guarantee a win in Pokémon Champions?

No. Type effectiveness is a useful starting point, but Double Battles also depend on moves, Abilities, weather, speed order, switching, items, targeting, and teammates.