* AntiHero (Type IV)/ AntiVillain (Type I)
* ElectiveUnintelligible
* IronButtMonkey
* Creator/JimCummings
* PunchClockVillain: Replaced [[WesternAnimation/RalphWolfAndSamSheepdog Ralph Wolf]] in one episode.


* MauriceLaMarche
* NoCelebritiesWereHarmed: Of Music/BingCrosby
* TrademarkFavoriteFood: OJ
** "Yay"

* CheerfulChild

* KellieMartin
* ValleyGirl

::'''Digeri Dingo'''
* DeadpanSnarker
* FourthWallObserver
* {{Jerkass}}
** JerkWithAHeartOfGold
* RobPaulsen

::'''Wendell T Wolf'''
* Creator/JimCummings
* LastOfHisKind: The Last Tasmanian Wolf (Thylacine)
* NoCelebritiesWereHarmed: Of Creator/WoodyAllen.

::'''Francis X Bushlad'''
* {{Determinator}}
* RobPaulsen

::'''Bushwacker Bob'''
* GrumpyBear
* HiddenHeartOfGold
* {{Jerkass}}: He ''does'' have a soft side, but it appears in about once in a blue moon.
* Creator/JimCummings


::'''Constance Koala'''
* CuteBruiser: "Autograph Pound" is one example.

* DanCastellaneta
* KangaroosRepresentAustralia: Technically a wallaby.
* KnowNothingKnowItAll

::'''Bull Gator'''
* AffablyEvil
* SesquipedalianLoquaciousness: He is known to make liberal use of phrases and linguistics not commonly heard by the layman.
* AntiVillain: He and Axl just want to please to zoo-going children of the world. And get money for doing so.
* FourthWallObserver: Sometimes Bull shows signs of Medium Awareness, and acknowledgement, that he exists on an animated television show.
* JohnAstin
* WellIntentionedExtremist
* PunchClockVillain
* LizardFolk: Of the Alligator Variety

* MinionWithAnFInEvil
* RobPaulsen
* PunchClockVillain: Seems to be this, just like his superior above.
* LizardFolk: Of the Alligator-type, just like Bull.
* ObfuscatingStupidity: One episode reveals that he holds multiple degrees, including a doctorate in biomolecular engineering, and he just acts stupid because it's part of being a sidekick.

::'''Buddy Boar'''
* FlatCharacter: Arguably, the most boring character on the show.
* Creator/JimCummings
* PutOnABus

::'''The Platypus Brothers'''
* [[EverythingsBetterWithPlatypi Everything's Better With Platypodes]]
* MauriceLaMarche and RobPaulsen

* {{Expy}}: Of The Roadrunner.
* RidiculouslyCuteCritter

* {{Lilliputians}}
* {{Ridiculously Cute Critter}}s

::'''Willie Wombat'''
* {{Expy}}: Of WesternAnimation/BugsBunny (Much to his chagrin).
* NiceGuy