As a Pokémon expert, I can tell you that evolving Pokémon like Tentacool is a common aspect of the game that allows you to access more powerful forms of these creatures. To evolve Tentacool into Tentacruel, you need to follow these steps:


1. Level Up: The most common method of evolution in the Pokémon games is leveling up. However, Tentacool does not evolve through leveling up alone.

2. Trade: Tentacool evolves into Tentacruel when it is traded with another player. This is a unique mechanic in the Pokémon games where certain Pokémon only evolve when they are sent to a different game through trading.

Here's the process in English:

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Tentacool (Japanese: ��Υ��饲 Menokurage) is a dual-type Water/Poison Pok��mon introduced in Generation I. It evolves into Tentacruel starting at level 30.read more >>