Spikey

 Spikey is a virus from the Mega Man 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 purple with some green stripes. In Mega Man Battle Network 4, Spikey2s are the same color as Spikey3s.

Spikey3
Spikey3s are yellow with blue 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.