Galar's Sand Snake Finally Slithers In
After skipping last year, Pokemon GO's Sustainability Week is back and bringing a long-requested Galar addition: Silicobra and its evolution, Sandaconda. Niantic confirmed the debut for Tuesday, April 14 through Monday, April 20, lining up another headline catch in what’s already been a packed 2026. The rollout lands during the game’s 10th anniversary season, Memories in Motion, which runs until June 2.
Silicobra will appear in the wild throughout the event and evolves into Sandaconda with 50 Silicobra Candy. It’s a Ground-type first discovered in Galar, and fans have been waiting on its Pokemon GO debut since the first Gen 8 wave arrived back in 2020. The gap has narrowed recently—March’s Bug Out introduced Blipbug, Dottler, and Orbeetle—but Silicobra marks the next step in filling out the remaining Galar roster.
Spawns, Shinies, and a Sunglassed Surprise
Sustainability Week isn’t just about one newcomer. Niantic says event-themed encounters will include Castform, Seedot, Wiglett, Toedscool, and Silicobra in the wild worldwide. The studio adds that Wiglett, Toedscool, and Silicobra will show up more often in their natural biomes, and even hints at where to hunt Silicobra: “desert-like areas.” Expect those sandy parks and arid trails to do some heavy lifting.
Shiny hunters get a couple of notable targets. The event debuts the shiny form of Toedscool, giving collectors a fresh chase during field sessions. There’s also a costumed twist: Galarian Corsola wearing pink sunglasses will appear more frequently on "Routes". Niantic hasn’t said whether this Corsola can evolve into Cursola, so plan on extra checks before you stockpile Candy. While walking Routes, players will also see boosted chances to encounter shiny Togetic, shiny Trubbish, and shiny Lapras.
Because Routes sit at the heart of this year’s Sustainability Week, the feature gets a soft spotlight. It encourages walking and local exploration while making it easier to connect with other players. That social angle matters for postcard collectors too; more Route activity means more Gift exchanges and more opportunities to pin non-local postcards for Vivillon patterns.
Eggs and Event Pass Perks
Egg enthusiasts have a clear set of targets coming from 7 km Gifts during the event. Hatches will include Lapras, Togepi, normal Castform, Trubbish, and the pink-glasses Galarian Corsola. If you’re chasing that specific costume, 7 km Eggs and Route spawns give you two workable lanes.
Niantic is also rolling out an event-exclusive GO Pass with a couple of quality-of-life boosts. The standard version offers half Egg hatch distance and double XP from spinning PokeStops, which pairs nicely with Route walking and those 7 km Egg batches. A GO Pass Deluxe will be available as well and adds a limited avatar pose for players who want a cosmetic tie-in to commemorate the week.
With Silicobra evolving at 50 Candy, a modest grind during the event window should be enough to build a Sandaconda or two. Natural-biome bias for Silicobra, frequent Route walking for Galarian Corsola checks, and efficient 7 km Egg cycling under the hatch bonus all mesh into a straightforward plan.
Why This Debut Matters—and What’s Next
Gen 8 additions have arrived in spurts, and there was a lull after December 2025 before March’s Bug Out event nudged the Pokedex forward. Silicobra’s debut signals that Niantic is back to seeding Galar monsters through limited-time events rather than large drops. It fits the cadence of the year so far, where nearly every month has introduced something new to chase.
Memories in Motion still has plenty of runway, and Niantic has already stoked the near-term calendar. On March 28, the game will introduce Gigantamax Pikachu—one of the most requested G-Max debuts to date. The season trailer also teased Flittle and Espathra, though dates for those Psychic-types haven’t been locked. If Sustainability Week is any indication, the rest of spring should keep Trainers busy with a steady trickle of first-time encounters and specialty forms.
Sustainability Week’s return after a one-year break feels smart: it ties a real-world theme to a mix of new species, shinies, and Route-focused play, all while nudging players to get outside. If you’ve been waiting to add a coiled Sandaconda to your roster—or you just want that pink-glasses Corsola for the collection—block out April 14–20 and start plotting your Route. The Galar bench isn’t empty yet, and this season looks ready to keep the debuts coming.
