M‑C Shakes Up Pokémon Champions: 24 New Pokémon & Six Fresh Mega Evolutions Arrive

Pokémon Champions is moving into its next competitive format with Regulation Set M-C, expanding Ranked Battles with 24 newly available Pokémon and six new Mega Evolutions.

Unlike a full roster reset, M-C keeps Pokémon that were eligible under previous regulations, giving M-B players a foundation to adapt to the new competitive pool.

Here’s everything confirmed about the Regulation M-C start date, new Pokémon, Mega Evolutions, roster changes, and team preparation.

When Does Pokémon Champions Regulation M-C Start?

Regulation Set M-C begins on September 8, 2026, at 7:00 PM PDT and runs until December 1, 2026, at 5:59 PM PST.

For players in many regions outside North America, the format will begin on September 9 because of the Pacific Time start.

Players can use this period to test the expanded roster, adjust existing teams, and adapt to the early M-C meta.

What's New in Regulation M-C?

The biggest change in M-C is an expanded competitive roster.

According to the official announcement, 24 Pokémon will become newly available for battle, while Pokémon eligible under previous regulations will remain available. Rillaboom is one of the newly available Pokémon highlighted by The Pokémon Company.

Players can check the complete M-C roster in-game:

1. Open Recruit.
2. Select Recruit Pokémon.
3. Choose Roster Info.
4. Open Pokémon Featured in This Roster.

This is the best way to confirm the active roster when M-C goes live.

Six New Mega Evolutions in M-C

Regulation M-C adds six new Mega Evolutions:

Mega Absol Z

Mega Garchomp Z

Mega Lucario Z

Mega Salamence

Mega Golisopod

Mega Baxcalibur

These additions give players more options for team building and could change Mega Evolution matchups in the early M-C meta. Their actual impact will become clearer once Ranked Battles begin.

M-C vs M-B: What's Changing?

The simplest way to understand Regulation M-C is as an expansion of the existing competitive environment rather than a complete roster reset.

This means M-B players can continue using established Pokémon while adapting their teams to the new threats.

The main challenge will be understanding how the additional Pokémon and Mega Evolutions affect existing matchups.

How to Prepare Your Team for M-C

You do not need to fully rebuild an M-B team for M-C. Start by reviewing your existing core, win conditions, defensive answers, and speed control, then test them against the expanded roster.

Treat the 24 new Pokémon as potential matchup changes rather than automatic upgrades. Also test your team against the six new Mega Evolutions and make adjustments where needed.

If building a new team, establish a reliable core first instead of trying to use several new Pokémon at once.

Which Mega Evolutions Could Be Important in M-C?

It is too early to rank the new Mega Evolutions before live battle data is available.

Mega Salamence, Mega Golisopod, and Mega Baxcalibur are among the additions worth watching, while Mega Absol Z, Mega Garchomp Z, and Mega Lucario Z add further options to the Mega pool.

Their actual impact will become clearer through Ranked Battle usage and tournament results after M-C launches.

What to Watch in the Early M-C Meta

The opening weeks of Regulation M-C should reveal which additions can genuinely compete with established choices.

New Pokémon Usage

The 24 newly available Pokémon will be one of the biggest areas to monitor. Some may immediately find a place in existing team archetypes, while others could remain niche despite becoming legal.

Mega Evolution Trends

The six new Mega Evolutions could influence both team construction and matchup preparation. Their early usage will show whether they become common offensive threats, defensive options, or specialized picks.

M-B Cores

Previously successful M-B teams may remain relevant because their core Pokémon are still legal. If they continue performing well, the early M-C meta could retain more of its previous structure than expected.

If the new additions create significant matchup pressure, however, established teams may need larger changes.

These are areas to monitor after launch rather than confirmed predictions about the final M-C meta.

Common M-C Team-Building Mistakes

Do not replace proven Pokémon simply because new options are available, or build around a new Mega Evolution without testing it against established threats.

Newly available does not automatically mean better. Test different team combinations and let actual Ranked Battle performance guide your changes rather than the announcement alone.

Regulation M-C Preparation Checklist

Before Regulation M-C begins, players should:

• Check the complete in-game M-C roster.
• Review existing M-B teams and identify their strongest components.
• Test against the 24 newly available Pokémon.
• Prepare answers for the six new Mega Evolutions.
• Recheck speed control and defensive matchups.
• Track early Ranked Battle usage after launch.

The goal is not to predict the entire M-C meta before the format starts. It is to enter the new regulation with a flexible team that can adapt as players discover which additions actually perform well.

Final Thoughts on Pokémon Champions Regulation M-C

Regulation M-C expands the Pokémon Champions competitive roster with 24 newly available Pokémon and six new Mega Evolutions, starting September 8, 2026, at 7:00 PM PDT.

M-B players can keep their existing team cores and adjust them around the new roster rather than starting over. The strongest new picks will become clearer once Ranked Battle data arrives, so testing the new matchups early will be key.