Mega Evolution is one of the few mechanics in Pokémon GO that rewards long-term investment in a single Pokémon rather than just catching more of them. Here’s how it actually works, what Mega Energy costs at each stage, and why powering up your Mega Levels matters more than most players realize.
What Mega Evolution Does
Mega Evolving a Pokémon temporarily boosts its stats and — more importantly for raids — grants a damage bonus to the entire raid party for as long as it stays Mega Evolved: +10% damage to every move used by anyone in the lobby, and +30% damage to moves that share a type with the Mega Pokémon. This is why a single trainer bringing a Mega Rayquaza or Mega Gengar can noticeably speed up a group raid even if nobody else changes their team.
Mega Energy: How to Get It and What It Costs
Mega Energy is species-specific — Charizard Mega Energy only Mega Evolves a Charizard, and doesn’t carry over to other Pokémon. The main ways to earn it are completing Mega Raids (both the battle reward and the post-raid catch), and catching Pokémon of the same species while your buddy is currently Mega Evolved.
The first time you Mega Evolve a specific Pokémon, it costs the most Mega Energy — typically between 100 and 200 depending on the species. After that first evolution, the cost to Mega Evolve that same individual Pokémon again drops significantly, and continues to fall as its Mega Level increases.
Mega Evolution Duration and Rest Periods
Once Mega Evolved, a Pokémon stays in its Mega Form for 8 hours. After the timer runs out, it enters a rest period during which it can’t Mega Evolve again for free — you can still pay Mega Energy to Mega Evolve early during the rest period, at a reduced cost that shrinks the closer you are to the rest period ending. Once the rest period fully elapses, you can Mega Evolve that Pokémon again at no cost.
Mega Levels: Base, High, Max, and Super Max
Every time you Mega Evolve the same individual Pokémon, it earns progress toward its next Mega Level. Each level shortens the rest period and improves catch bonuses while that Pokémon is actively Mega Evolved:
| Mega Level | Catch Bonuses | Rest Period |
|---|---|---|
| Base | +1 Candy per catch, 20% reduced re-evolution cost | 7 days |
| High | +50 catch XP, 10% chance of bonus Candy XL, additional 10% reduced cost | 5 days |
| Max | +2 Candy per catch, +100 catch XP, 25% chance of bonus Candy XL | 3 days |
| Super Max | Further increased Candy, XP, and Candy XL chance for same-type catches | 24 hours |
The team-wide raid damage boost (+10% / +30%) stays the same at every Mega Level — leveling up mainly rewards players who Mega Evolve the same Pokémon often, by making it cheaper and faster to keep it active.
Primal Reversion Works the Same Way
Primal Groudon and Primal Kyogre use their own version of Mega Energy but follow the same underlying system — a timed transformation, a rest period, and levels that reduce future costs — so everything above applies to them as well.
Is It Worth Powering Up a Mega?
If you raid regularly, yes — a maxed-out Mega Level means you can keep a strong attacker Mega Evolved almost constantly without needing a large Mega Energy stockpile. Our Best Attackers by Type guide lists which Megas are worth prioritizing first, and the Mega Raid rotation guide tracks which Mega bosses are currently available to farm energy from.
