Spikey

 Spikey is a virus from the MegaMan Battle Network series. They are large canine-like viruses that spit fire. In Mega Man Network Transmission, their attack patterns are very similar to the Hot Dog enemies in Mega Man 2. They also teleport around the field very fast unless they stop to attack. The variants are faster and the attacks explode in different directions depending on their level.

Spikey
 Spikeys are blue with some red stripes.

Spikey2
 Spikey2s are yellow with some blue stripes. In Mega Man Battle Network 4, Spikey2s are the same color as Spikey3s.

Spikey3
 Spikey3s are purple with some green stripes. In Mega Man Battle Network 4, Spikey3s are the same color as SpikeyΩs.

SpikeyΩ
 SpikeyΩs are silver with some yellow stripes.

SpikeyEX
 SpikeyEXs are forest green with some purple stripes.

Spikey2EX
 Spikey2EXs are bright yellow with some red stripes.

Spikey3EX
 Spikey3EXs are dark green with some orange stripes.