Alpha-sapphire: Bulbasaur can be seen napping in bright sunlight. There is a seed on its back. By soaking up the sun’s rays, the seed grows progressively larger.Y: For some time after its birth, it grows by gaining nourishment from the seed on its back.X: A strange seed was planted on its back at birth. The plant sprouts and grows with this Pokémon.
Prof. Lotus' Notes: Hi, I'm Professor Lotus. I see you've found my notes. Did you know, Pokemon (ポケモン) is derived from a japanese portmantaeu of (ポケト Poketo / Pocket) and (モンスタMonsuta / Monster), and the design of pokeballs is actually based on capsule toys called ガチャポン - Gachapon. My theory: this is why Gotcha appears when you've caught a Pokemon - as homage, but, I take it you're here for Bulbasaur.
Bulbasuar is likely a portmantaeu of Bulb (plant on it's back) and Dinasaur. It's Japanese name is フシギダネ (Fushigidane), which can be seen as a play on words of 不思議種 (不思議 - Fushigi (Miracle) and 種 - Tane (Seed/Bulb)), but translated literally, it means - isn't it strange?