Gan-chan's homework is Yattaman
He's clearly full of gusto
Just when you think... ah, ah,
Suddenly, he transforms - with a racing heartbeat, he transforms
Trembling, he transforms - quickly, he transforms
Even their spirits match perfectly, man-to-man
Nattaman with Yattaman
Kakkooman is for the snazzy Ai-chan
And what's more, she's sweet and ladylike
Just when you think... ah, ah,
Suddenly, she transforms - with a racing heartbeat, she transforms
Trembling, she transforms - quickly, she transforms
Even their spirits match perfectly, man-to-man
Nattaman with Yattaman
Yattaman is a cool robot
Jump out of the way, there's the loud siren
It echoes with an ooh - ooh
Suddenly it rumbles, shaking - it rumbles
Rattling - it rumbles, pounding - it rumbles
Even their spirits match perfectly, man-to-man
Nattaman with Yattaman
DON DON is more of a sound effect that signifies drumming/rumbling/etc, so even though I translated it as "rumbling" it's better to think of it as a sound instead... maybe like, BOOM BOOM BOOM!