Unlockable: Characteres 

Defeat Picwick to unlock Pan-Pan and the Black Alien in vs. mode. 

After Pan-Pan, defeat Lunk to unlock him in vs. mode. 

Defeat Lunk then go back to Ribbittron and defeat Pappy to unlock Pappy in vs. 
mode. 

Defeat Pappy to frolf against Sir Waddlesworth. Defeat him to unlock him in vs 
mode. 
 
Unlocking clips:
Collect 10, 20, or 30 Bottle Caps or complete any other task on the bonus disc.

Frogs:

Atom: Kosmo's frog. No apparent attributes (he has antennas). Obtained after 
defeating Kosmo 2. 
Binky: Pepe Pappy and Papoo's frog. It is a swimmer. Obtained after defeating 
Pepe for the third time. 
Dipsy: Princess Tippi's frog. It is the best swimmer; will dive under water for 
bubbles without the scuba tank. Obtained from Princess Tippi 2 after defeating her. 
Flippy: Gumbah-Goo's frog. No apparent attributes (capsule frog). Obtained after 
defeating Gumbah-Goo 2. 
Li'l Lunk: Lunk's Frog. impervious to lava. Obtained after defeating Lunk 1. 
Pouncer: Pan-Pan's frog. No apparent attributes (likes bamboo leaves). Obtained 
from Pan-Pan 2. 
Scrappy: Never gets dizzy or tired. Obtained after completing the game for the 
first time (when you get the Frolf Championship Cup). 
Sebastian: Pickwick's frog. No apparent attributes (made of wicker). Obtained 
from the Gumbah-Goo Machine. 
Shakey: Sparky & Woosh's frog. Ghost, impervious to lava. Obtained after 
defeating Sparky & Woosh 1. 
Skitter: The frog you start out with. No special attributes. 
Slugger: Sluggy's frog. Hates water. Obtained from the Gumbah-Goo Machine. 
Wadsworth: Sir Waddlelot's frog. Likes oil and electricity. Obtained after defeating 
Sir Waddlelot 1. 

Special frogs and items:
After you defeat an opponent, sometimes they will give you an egg. If you buy the 
egg, after a short time it will become a frog. You are not notified of this, but if you 
keep checking back in Picwick, go to the Frogs section. The frogs you have 
hatched will be in there. Sometimes your opponents will also offer you items. 
Note: After defeating Sparky & Woosh 2, they may try to sell you some "Game 
Hints" book for 100,000. They will never offer it again -- it is recommended you 
buy it at that time if desired.