Let Chibi Robo completely run out of energy at least once. Telly Vision will rescue you and you will receive the "Trauma Suit" which consists mainly of bandages and a very funny pose animation. After this, you can equip and unequip the Trauma Suit anytime from your items page.
Unlockable Frog Suit
Get the squirter on the table in Jenny's room and fill it. Hose the frog in the backyard several times and it will award you with this suit.
Unlock Ghost Suit
This can only be found once you've acquired the Trauma Suit. Strike a pose in the Trauma Suit and you'll go to the Chibi-House. When you wake up there, you'll be wearing the Ghost Suit.
Unlockable: Alien Ear Chip
you must buy it from the shop for 2150 M after first contacting the aliens.
Unlockable: Charge Chip
You must buy it from the shop for 860 M after buying the Chibi-Blaster.
Unlockable: Chibi-Radar
You can buy it in shop for 1120 Moolah after giving Mrs. Sanderson some clothes for the pajamas.
Unlockable: Extra Battery
Purchase from the shop for 940 M after passing out once.
Unlockable: Drake Redcrest Suit
You must go an talk to Drake Redcrest in the Living Room at night.
Unlockable: Chibi-Blaster
You can buy it in shop for 1110 Moolah.
Unlockable: Hot Rod
You can buy it from the shop for 2740 M after members of the Free Rangers leave the troop.
Unlockable: Mug
You can find it on the kitchen counter during the day.
Hint: Giga Charger
The Giga Charger is in the basement. Use chibi-vision to look up at the ceiling keep looking until you spot it. Once you do, shoot down the wooden board nearby and follow that path. Once you obtain it, Captian Plankbeard will tell you about the Giga Robos leg.
Hint: Frog Forking
Have you been curious about those weird looking rings that have a frog's head on them? Well, collect them! If you give each one to Jenny (ten in all) she'll take that stupid frog hat off.
Hint: Invisible Doors
Some of the Chibi Doors are invisible. Once you buy
the Chibi Radar, use it to track them down. Once you
reach the spot where it is hidden, charge up your Chibi
blaster and use it to blast the door into visibility.