Bayleef: Bayleef ベイリーフ. Synthesis----5--The user restores its own HP. The amount of HP regained varies with the weather. Ancientpower: 60: 100: 5: 10: Biology Physiology. Bayleef is a yellow, dinosaur-like Pokémon. Around its neck are several small leaves that Bayleef can shoot at opponents. There is also a large. Details and added effects for the Pokémon attack 'Synthesis', including all the Pokémon that can learn it. Synthesis (move) From Bulbapedia, the. Synthesis restores the user's current HP based on the weather and time of day. Bayleef restores itself using. Bayleef can be rarely found in grasslands among other Bayleef and its evolutions. In the anime. Bayleef in the anime. Synthesis: Grass: Status — —% 5 Bayleef @ Eviolite Lv. 100 -- (No Ability) Nature: Modest. Leech Seed; Toxic; Synthesis; Hidden Power 2 - 20.55 % (15 battles) Bayleef @ (No Item) Lv. 100. Pokemon Ruby Version - Pokemon of the Day: Bayleef. Today's Pokemon is Bayleef!. Ingrain and Synthesis. Bayleef's neck is ringed by curled-up leaves. Synthesis----5--The user restores its own HP. The amount of HP regained varies with the weather. Worry Seed--100: Bayleef’s neck is ringed by curled-up leaves. Inside each tubular leaf is a small shoot of a tree. Synthesis: 5 — — Heals the user by half its max HP. Pokédex entry for 153 Bayleef containing stats, moves learned, evolution chain, location and more!.