Pokémon GO: Spring Marathon & Deino CD

Pokémon GO has one of those unusually dense weeks where several different systems all change at once. The headline items are Spring Marathon, which starts Tuesday, May 12, and Deino Community Day Classic, which hits Saturday, May 16. But the real story is that this week also flips raid bosses, brings in a new Pokémon family, and drops one of the better Community Day Classic targets for anyone still building Dark-type raid teams. ### What actually starts this week? Spring Marathon runs from Tuesday, May 12, at 10:00 a.m. local time through Monday, May 18, at 8:00 p.m. local time. Its two headline debuts are Flittle — which can evolve into Espathra with 50 Candy — and Pikachu wearing a marathon visor, which can also be shiny. The event also swaps in special 5 km Eggs, event Field Research, and a limited-time GO Pass tied to the week. (pokemongohub.net) ### Why is Flittle the important part? Because this is not just a costume event. Costume Pikachu is nice, but Flittle is a brand-new Pokédex addition, and that changes the week from “extra catches” to “must log in.” If you care about collection progress, this is the real prize. Espathra’s arrival matters too, since debut events are usually the easiest window to stockpile candy before a species gets diluted into the normal spawn pool. (pokemongohub.net) ### What does the event give you? The free Timed Research gives 21,000 XP and a visor Pikachu encounter. The GO Pass adds more XP, Stardust, Rare Candy, Ultra Balls, and event encounters, with milestone bonuses that include 2× XP for spinning PokéStops and 1/2 Egg Hatch Distance during the event window. Basically, Spring Marathon is built to reward movement and spinning, not just raw catching. (pokemongohub.net) ### When is Deino Community Day Classic? Saturday, May 16, from 2:00 p.m. to 5:00 p.m. local time. Deino will spawn heavily, shiny odds are boosted to about 1 in 20, and catches give 3× XP. If you evolve Zweilous into Hydreigon during the event or up to 9:00 p.m. local time, Hydreigon gets Brutal Swing — the exclusive move that makes this event worth planning around. (pokemongohub.net) ### Why does Brutal Swing matter so much? Because Community Day Classics live or die on the move, not the mascot. Hydreigon without Brutal Swing is fine. Hydreigon with Brutal Swing is the version people actually want. The move hits for 55 power in Trainer Battles and 65 in Gyms and raids, so this is the efficient way to build one if you missed Deino the first time around. (pokemongohub.net) ### Is there anything easy to miss? Yes — the lure bonus. Regular Lure Modules only last 1 hour during the event, but from 2:00 p.m. to 9:00 p.m. local time they also have a very high chance to pull in extra Deino at PokéStops. That means the event effectively stretches beyond the main three-hour window if your area has active lures. It’s a little like an afterparty built into the map. (pokemongohub.net) ### What else changes around it? Raid content rotates on Wednesday, May 13. Nihilego leaves five-star raids, and Pheromosa, Buzzwole, and Xurkitree take over by region, with Mega Glalie replacing Mega Camerupt in Mega Raids. There’s also Max Monday on May 11 with Dynamax Growlithe from 6:00 to 7:00 p.m. local time. One odd wrinkle — May 2026 has no normal Spotlight Hours at all, so these event windows carry more of the month’s weekly rhythm than usual. (pokemongohub.net) ### Bottom line? This is a “pick your lane” week. Collectors should prioritize Spring Marathon for Flittle. Battlers and raiders should circle Deino Community Day Classic for Brutal Swing Hydreigon. If you play both ways, this is one of the better Pokémon GO weeks of May. (pokemongohub.net) (pokemongohub.net)