Dogadon
Dogadon is a giant dragonfly (literally a dragon with insect wings) that is a boss in Donkey Kong 64.
Dogadon is first encountered in the area Angry Aztec. Diddy feeds a bunch of bananas to Scoff and Troff to open the boss door. Inside a brief cutscene of Diddy being pestered by a dragonfly is shown. Diddy stomps on this dragonfly and Dogadon appears.
Dogadon begins by flying around the room spitting fireballs at him. After Diddy manages to avoid these, Dogadon will land to rest on the stone platform. Diddy can now attack by throwing a TNT Barrel at him. This will knock Dogadon into the sea of lava around the platform.
Dogadon will burst out of the lava and start firing fireballs again, this time though he will fire more and faster. When Dogadon lands to rest Diddy must hit him with another TNT Barrel. Once again Dogadon will fall into the lava and fly out of it one more time. After Diddy strikes Dogadon with another TNT Barrel he will fall into the lava again, this time he does not come out. Diddy can now claim the boss key Dogadon was guarding.
Dogadon returns later in the game as the boss of Fungi Forest. Chunky, after feeding Scoff and Troff, enters the Fungi Forest boss door and fearfully looks around. Suddenly Dogadon appears in front of Chunky, horrified at the monster he has to fight Chunky begins to bow to and ask for mercy from Dogadon. This ploy fails.
The first bit of Chunky's battle with Dogadon is basically the same as Diddy's. Chunky must dodge blast of fire spat at him by Dogadon and hit the dragon with TNT Barrels when it lands to rest. The second time he will also use a shock wave (which Chunky can jump over). After being hit two times with TNT Barels Dogadon will show off a new ability, he will send a wave of fire at Chunky. After taking damage from this attack Chunky must grab the TNT Barrel in the middle of the stone platform and throw it at Dogadon.
Suffice to say Dogadon is now not very pleased.
Returning to the stone platform Dogadon will angrily begin to stomp on it, this will cause it to start sinking. Now the battle has turned into a race against time. Dogadon will begin to fly around the arena spewing fireballs at Chunky once again and once again Chunky must throw a TNT Barrel at Dogadon when he lands to rest. This time though instead of Dogadon falling into the lava a Hunky Chunky Barrel will appear where the TNT Barrel was. Chunky has to hop into this barrel and will transform into Hunky Chunky. Now Chunky can pummel him with his bare-fists, at least until the effects of the transformation into Hunky Chunky wear off. After this Chunky must repeat the process of hitting Dogadon with TNT Barrels, changing into Hunky Chunky and pummeling Dogadon until he is defeated. After Dogadon is defeated he will relinquish his second boss key.
In a later cut scene in the game King K. Rool can be seen speaking with Dogadon. After explaining that he lost to Chunky (and almost bursting into tears while doing so) Dogadon says he is going to lie down. It is not elaborated on whatever happened to Dogadon after K. Rool was defeated.