Ancient Ruins is one of PokeRogue 35 biomes, the area is named for its ancient ruins and mystery, Ancient Ruins is classified as an important area in the game with high rarity Pokémon, many involved Pokémon are encountered in the early stages, the ruins are guarded by a powerful Koraidon, and the level will be encountered in two The level will encounter a Boss Battle divided into two stages. In Classic Mode and Daily Pass, the biomes change every 10 waves, while in Endless Mode, the biomes change randomly every 1 to 4 waves.
Biome distribution chart
| Arrow Color | Encounter Chance |
|---|---|
| Blue | 50% |
| Yellow | 33% |
| Red | 25% |
Connected Biomes
| Movement | ||||
| Desert (100%) | → | ancient ruins | → | Forest (100%) |
| Temple (33%) | ||||
| Space (100%) | ||||
Standard Pokemon
| Common | |||||
| commonly |  Drowzee |  Hypno |  Natu |  Xatu |  Unown |
 Spoink |  Grumpig |  Baltoy |  Claydol |  Elgyem | |
 Beheeyem | |||||
| Uncommon |  Abra |  Kadabra |  Sigilyph |  Tinkatink |  Tinkatuff |
 Tinkaton | |||||
| Rare |  Mr. Mime |  Wobbuffet |  Gothita |  Gothorita |  Gothitelle |
 Stonjourner | |||||
| Super Rare (SR) |  Espeon |  Archen |  Archeops |  Runerigus |  Galarian Yamask |
| Ultra Rare (UR) |  Registeel |  Fezandipiti | |||
| Standard Encounter Rates | |||
| Rarity | Roll Limit | Encounter Chance | Max Luck Encounter Chance |
| common | 512 | 69.53% | 67.77% |
| Uncommon | 156 | 24.22% | 25.62% |
| rare | 32 | 5.08% | 5.37% |
| super rare (SR) | 6 | 0.98% | 1.03% |
| ultra rare (UR) | 1 | 0.20% | 0.21% |
Boss Pokemon
| Boss | |||||
| commonly |  Alakazam | Hypno | Xatu | Grumpig |  Claydol |
Sigilyph | Gothitelle |  Beheeyem | Tinkaton | ||
| Rare | Mr. Mime | Espeon | Wobbuffet | Archeops | Runerigus |
| Super Rare (SR) | Registeel | Fezandipiti | |||
| Ultra Rare (UR) |  Koraidon | ||||
| Boss Encounter Rates | |||
| rarity | Roll Limit | Encounter Chance | Max Luck Encounter Chance |
| common | 64 | 68.75% | 64.91% |
| Rare | 20 | 21.9% | 24.56% |
| super rare (SR) | 6 | 7.8% | 8.77% |
| ultra rare (UR) | 1 | 1.6% | 1.75% |
