I don't know where you can find a trainer with Tentacool, but you can easily find it surfing on Route 205.
Use Surf on Route 205 and you'll easily find a Tentacool.
No.
no
The first trainer on the way to the Pokemon league has a luminion.
I don't know where you can find a trainer with Tentacool, but you can easily find it surfing on Route 205.
In diamond is TENTACOOL but I am not sure about in other Pokemon games. In diamond is TENTACOOL but I am not sure about in other Pokemon games.
Use Surf on Route 205 and you'll easily find a Tentacool.
It evolve in level 30 into a Tentacruel
about 7,000 steps
No.
no
The first trainer on the way to the Pokemon league has a luminion.
no
yes
There is a trainer with Buneary in the Warward Cave on Pokémon Diamond. The trainer's name is Lass Cassidy and can be found on the 1st floor of the cave.
none have elekid you will need to migrate