Den Hajime transforms when he feels good (from beer, porn, hugging a girl, etc <- his henshin has the most "win" out of all tokusatsu heros) and becomes 2000 meter tall superhero, Den Ace. This is hilarious especially if you've watched the 1970's style tokusatsu (live action special effects) like the Ultraman series, Kamen Rider, Kikaida, etc because it takes the level of corniness to a whole new level.

The first two clips looks like they were shot in the 90's (but mimic the 70's style of voiceover, music, effects, etc) while the third one is a clip from a 2007 DVD release (which I'm not about to spend ￥3600 on).