Best Ancient Zoan One Piece

Ryu Ryu no Mi, Model: Pteranodon – King wins 67% of its duels and tops the One Piece Ancient Zoan ranking ahead of Neko Neko no Mi, Model: Saber-Toothed Tiger – Who's-Who.

The gap between King's pteranodon and Who's-Who's saber-toothed tiger stands at 72 ELO points, the widest split in the ranking. X Drake's Allosaurus holds third with 1233 points, closely trailed by Jack's Mammoth at 1229. This tight clustering near the podium shows how evenly matched these transformations appear to voters, with just 4 points separating ranks 3 and 4. Black Maria's Rosamygale Grauvogeli rounds out the top 5 at 1216 ELO. The bottom reveals harsh judgment: Sasaki's Triceratops languishes at 1017 ELO with a 28% win rate across 104 duels, suggesting the community finds some Ancient Zoans far less compelling than others. Page One's Spinosaurus fares only slightly better at rank 8, winning 43% of its 126 duels, while Ulti's Pachycephalosaurus sits at rank 7.

This ranking draws from 7228 duels cast by 379 players across 9 Ancient Zoan contenders, updated on 10 October 2026. Each vote refines the hierarchy, measuring which prehistoric transformations resonate most with One Piece fans. Cast your own duels to shape the standings and see how your favorites measure against the current leaders.

Updated on October 10, 2026

How this ranking is computed

Every duel won lifts a contender and every loss drops them, by an amount that depends on the opponent's strength: beating the leader is worth more than beating the last. It is an ELO, the same principle as in chess. Duels are not drawn at random — an adaptive entropy sort puts the least predictable match-ups first, which settles the ranking far faster than a full round robin. A worldwide ranking is only published past 30 completed plays. Known limit: a contender who has faced few opponents keeps an approximate score, and the bottom of the table moves more than the podium.

How our rankings are made →