Rizzo is a member of the Raven Tribe.
Rizzo is a Dungeon boss. He must be fought twice, once in two different dungeons. He reveals that he is working for Reegull, and when the flowers controlling him are smashed and he is defeated, he vows revenge against him.
Once the first Elite Guard is smashed, another Elite Guard will spawn further south in the arena, this time accompanied by an additional spawning grunt and blaster-medic. Grunt spawn rates will increase and the medic will periodically respawn until the second Elite Guard is also smashed.
When the second and final guard is defeated, all other spawns will stop and Rizzo will appear in the far north end of the arena alongside an escort of two high-level raven warriors - one wielding a grandorsion and vengious, the other wielding a healing beamer and swamp gas launcher. Rizzo himself will carry his signature Bazooklaw and can easily be identified by his silver peg-leg - he also always spawns in the middle.
At any time during or after the fight, players can activate a pressure plate which lowers the spikes blocking off the island with the final Tear.
The first phase is very straightforward - focus on smashing the Elite Guard as quickly as possible before his support can wear you down, you won't face too much resistance.
The second phase, however, requires a little more effort, as the raven medic, if left unchecked, can heal the second Elite Guard and hinder your progress. Grunt spawns will occur much more frequently, so it is advised to also keep them in check, if possible. Always attempt to destroy or distract the medic as soon as he spawns!
The final phase can be the trickiest if players are not prepared for the special medic that accompanies Rizzo. His swamp gas launcher will not only poison the player, but will also cause fear, making you lose control of your movement and attack, leaving you helpless. This medic should be distracted as much as possible (bee hives work well) or destroyed as quickly as possible (he cannot heal himself). The second guard has much more HP and can also inflict zap on the player, stunning them occasionally. Being melee only, it is advised to take him out from a distance if possible. Rizzo himself has the least HP out of the three and is particularly weak when it comes to attacking, though his Bazooklaw will knock the player back when he fires it. Note that it is possible to defeat Rizzo immediately if the player CHIs up and focuses directly on him. His reduced HP makes it possible to smash him before the medic can begin healing him and often allows the player to finish him off despite the medic's healing if their attack is sufficiently strong enough.
Rizzo is a scruffy scavenger with ragged fur and an eyepatch, and prides himself on being “the bottom of the bottom feeders.” Even Ravens have a slight bit of dignity, but not Rizzo. He has proudly nicknamed himself the “Shah of Shamelessness.”