Why does Caterpie supposedly turn into Rayquaza? The real evolution, years of memes, fan theories and the official changes that are almost as bizarre.
“Your Caterpie is evolving!”
Wonderful. Metapod, then Butterfree.
Rayquaza.
Hold on. The bug that ate a leaf five minutes ago now lives in the ozone layer and consumes meteoroids. That is not evolution. That is an intern being promoted to president of the sky.
Is the evolution real?
No. Caterpie officially evolves into Metapod and then Butterfree. Rayquaza is a separate Legendary Pokémon.[1][2] Still, both are long and green. Caterpie is 0.3 meters tall; Rayquaza is about 7 meters. If “green noodle” counts as a family tree, the Pokédex needs an emergency audit. Your eyes say “They look similar” just before your brain shouts “Absolutely not.”
Where did the meme come from?
People were connecting “Mega Caterpie” and Rayquaza in Reddit comments in 2019.[3] Similar jokes appeared in 2023; a 2026 post gave the comparison a dramatic “remember who you are” presentation.[4][5] Another 2026 fan post invented ridiculous requirements such as level 99, perfect individual values and a special evolution time.[6] Caterpie is no longer evolving; it is applying for a top-secret government job. Those posts document a recurring joke, not its definitive inventor or worldwide popularity.
Reality is not much less ridiculous
Venonat → Butterfree? The similar eyes and antennae inspired a fan theory that Butterfree and Venomoth were switched during development. That is unconfirmed; the actual evolutions remain Venonat → Venomoth and Metapod → Butterfree.[7]
Luvdisc → Alomomola? They look like a small and large version of the same heart-shaped fish, but neither evolves into the other.[8] Meanwhile Remoraid → Octillery is official: a fish turns into an octopus.[9] Dratini → Dragonair → Dragonite goes from a sleek blue dragon to a round orange one, while Magikarp → Gyarados turns a weak-looking fish into a fearsome monster, echoing the carp-over-the-waterfall legend.[10]
The joke works twice: the fake evolution is preposterous, and the real ones are sometimes nearly as wild.
If your newly caught Caterpie suddenly becomes Rayquaza, forget pressing B. Call the professor. Biology has left the building.
References (10)
- [1] Pokémon Pokédex: Caterpie
- [2] Pokémon Pokédex: Rayquaza
- [3] Reddit 2019: Mega Caterpie references
- [4] Reddit 2023: Caterpie–Rayquaza joke
- [5] Reddit 2026-04-02: Remember Who You Are
- [6] Reddit 2026-07-01: made-up evolution conditions
- [7] Dexerto: Venonat/Butterfree and Luvdisc/Alomomola fan theories (2024)
- [8] Pokémon Pokédex: Luvdisc · Alomomola
- [9] Pokémon Pokédex: Remoraid
- [10] Official Pokémon article: Magikarp–Gyarados; Dratini–Dragonite
