Thunder learned after completing Phil’s barrel training at the Olympus Coliseum.
thundara learned after defeating Ursula for the last time at Atlantica.
Thundaga learned after defeating Cerberus in the Hades Cup at the Olympus Coliseum. Cerberus is the second boss and the twenty-ninth fight in the series.
All About Thunder Magic in KH1


The Thunder Spell in Kingdom Hearts is an area-of-effect (AOE) lightning attack.
They are perfect for clearing small seeds or dealing damage to tougher clusters.
Each Thunder spell cast costs 1 MP. And as usual, Donald learned a new Thunder spell every time Sora did it.
How to Learn Thunder
Thunder learned after completing Phil’s barrel training at the Olympus Coliseum. Doing the training is the first thing you’ll do when you arrive, so it’s almost impossible to miss.
Thunder has a small AOE but is very useful against enemies swarming around Sora, such as Powerwilds or Shadows.
The Thunder damage formula is as follows:
Max MP Sora x 2 + 16 = spell power
How to Learn Thundara
You get Thundara after defeating the giant Ursula in Atlantica. He’s the world’s last boss, so it’s hard to miss if you’re just reading the story.
Thundaga covers a larger area and has larger bolts. It also has a good boost for damage, which follows this formula:
Max MP Sora x 2 + 20 = spell power
How to Learn Thundaga
Thundaga learned after defeating Cerberus in the Hades Cup. The three-headed K9 is the twenty-ninth fight.
To unlock the Hades Cup you need to clear Phil, Pegasus and Hercules Cups, and keyhole lock in Hollow Bastion.
Chip and Dale will notify you of new tournaments on the world map when you meet the requirements.
Thundaga darkens the sky and strikes a large area with a large fat bolt, dealing massive damage to anything trapped within. The damage formula is as follows:
Max MP Sora x 2 + 26 = spell power
Is Thunder Magic Worth It?
The interesting thing about the Thunder spell is they are completely optional.
Kingdom Hearts 1 is set up in such a way that you don’t have to visit the Olympus Coliseum or Atlantica at all. Like, forever – you can fly around them to any other world as needed.
Therefore, it is up to you if you want to learn the spell.
Remember, it’s learned sequentially, so if you get past the Coliseum and beat Atlantica first, you’ll learn Thunder from Ursula and then Thundara from Phil’s Training.
However, it is not recommended to skip this spell: Thunder is very useful. If Sora has a lot of MP, you can wipe out an entire group of heartless in just a few casts.
The Thunder and its upgraded forms are perfect for wiping out smaller foes in your path, and a great tool when farming for synthesis items.
Just because of you can skip doesn’t mean you Should.
This is too good!