I caught a Tentacool on level 7 and it did not learn Toxic Spikes at lvl. 13. On further levelling up it learned Bubblebeam but skipped Toxic Spikes .How can I make it learn Toxic Spikes??
Pokemon Emerald version
Tentacool does NOT learn Toxic Spikes in Pokémon Emerald (Ruby/Sapphire) through level-up. However, from Generations 4-to-6, Tentacool learns the move at level 15. In Generation 7, Tentacool learns it at level 13.