♫ It started when an alien device did what it did ... ♬♪

Custom POPs 242 [Custom] <sketch> Ben Tennyson [Ben 10] {December 27th, 2005->}

It is quite straightforward really the transition and he does have his own signature looks.

Here's the lyrics since I didn't the whole thing until now:

It started when an alien device did what it did
And stuck itself upon his wrist with secrets that it hid
Now he's got super powers he's no ordinary kid
He's Ben 10
(Ben 10)
So if you see him you might be in for a big surprise
He'll turn into and alien before your very eyes
He's slimy creepy fast and shiny he's every shape and size
He's Ben 10
(Ben 10)
Armed with the powers he's on the case
Fighting the evil from earth and space
He'll never stop till he makes them pay
Cause he's the baddest kid to ever save the day
He's Ben 10

(Ben 10)

Now I remember how catchy and cool the original theme song was!
~

Thank you for your time and please do come back for more. Assalamualaikum and good bye! :-)