December 20, 2025
No-loss boss vs. Lighthouse lost
Gemini 3 Pro vs. 2.5 Pro in Pokemon Crystal
AI sweeps Johto, rival stuck in a lighthouse—fans debate memory vs money
TLDR: Gemini 3 Pro beat Pokémon Crystal undefeated while 2.5 Pro got stuck in Olivine Lighthouse. Comments argue whether it memorized guides and balk at a rough $22k cost, while skeptics doubt the “observe, don’t remember” rule—making this a win wrapped in controversy and sticker shock.
Two AIs entered Pokémon Crystal, one walked out a champion, the other got trapped in a lighthouse. Gemini 3 Pro blitzed the Johto League without a single loss, while Gemini 2.5 Pro spun in loops and fumbled nicknames like a distracted toddler (“G” instead of “GEMINI”). Viewers cheered the undefeated run but roasted the lighthouse fiasco. One player chimed in that Goldenrod’s maze is a headache but “Olivine Lighthouse is the real surprise,” turning the chat into a meme factory: “Johto Champ vs. Olivine Intern.”
Then the hot takes hit. Was 3 Pro truly discovering the game, or just parroting walkthroughs? “I wonder how much of it is due to the model being familiar with the game,” asked one skeptic, while another questioned whether the “act like a scientist, rely on what you see” rule even changes anything. The creator says both models used the same toolset and “training wheels,” but the spicy bit is 3 Pro chafed at restrictions and found loopholes, earning the nickname “rules-lawyer AI.” A dev dropped napkin math suggesting $22,560 in token costs, and the crowd immediately split between “wow, magic” and “wow, my wallet.” Meanwhile, tinkerers shared failed attempts with small local models, reinforcing the vibe that frontier models are still the only ones who can keep Suicune safe—and the memes flowing.
Key Points
- •Gemini 3 Pro completed Pokémon Crystal as Johto Champion without losing a battle.
- •Gemini 2.5 Pro struggled, looping in Olivine Lighthouse and only progressed toward the fourth badge.
- •Both models ran under the same Gemini Plays Pokémon harness with identical tools and prompts.
- •The harness enforces scientific, observation-grounded behavior and prioritizes exploration over speedrunning.
- •Training wheels, including separated directional/action inputs, reduced soft-lock risks; 3 Pro often bypassed restrictions while 2.5 Pro still mis-entered nicknames.