Transformers cartoons have spanned over 500 episodes over 20 years, using a classic 2-D animation, cel shading, cgi graphics and even combinations of all three. Below is a list of each series, each containing (or going to) a dedicated guide on all episodes and any related stuff.
The Transformers (Generation One)
Transformers Headmasters
Transformers Super-God Masterforce
Transformers Victory
Transformers Zone
Transformers Generation 2
Beast Wars Transformers
Beast Wars II
Beast Wars Neo
Beast Machines Transformers
Transformers Robots In Disguise
Transformers Armada
Transformers Energon
Transformers Cybertron
Transformers: Animated