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They are all X-men, but the left side group is composed Family Guy characters and are the original five X-men, and the right side group is composed of Bob's Burgers characters and are the "new" X-men (the second class, basically). The image is an homage to X-men 100, which placed the same characters in the same poses.
Left to Right: Peter Griffin as Cyclops, Lois Griffin as Miss Marvel, Meg as Beast, Chris as Angel, Brian the Dog as Iceman, Stewie Griffin as Prof. Xavier, Louis Belcher as Wolverine, Gene as Banshee, Tina as Nightcrawler, Linda Belcher as Storm, and Bob Belcher as Colossus.
Nice work on the Mario pics, btw!

Thank you bro! I still have to upload more recent works. I don't know bob's burgers, will have to check em out.