-this page by Voyd
Wyvarans are magical hybrids of wyverns and kobolds. All of the ARG/B4 races are unique in some way, and the wyvaran is no exception; of the lot, the wyvaran is the only one of the dragon type.
Ability Scores: Wyvarans have +2 Dexterity and Wisdom, and a -2 penalty to Intelligence. They aren't the best at prepared arcane spellcasting, but they shine at divine spellcasting and ranging pursuits.
Type: Wyvarans are dragons. While this does mean you can't use spells like enlarge and charm person on them, it also means that they are completely immune to paralysis and sleep effects.
Normal Speed: 30 feet, same as humans.
Flight: Hold on there, ban-happy GMs. Out of all the 0HD races with fly speeds, wyvarans have the worst; only 30 feet and with CLUMSY maneuverability. While it's not as game-breaking as, say, the strix's fly speed, it's still fairly useful.
Slapping Tail: It sucks that it can only be used for attacks of opportunity, but 1d8 plus full Strength damage isn't to be ignored.
Darkvision and Low-Light Vision: Dr. Beck has already gone on and on about how darkvision is the best thing ever. It's good, alright?
Alchemist: Nothing too exciting here, and in fact a penalty to Intelligence. The only thing going for a wyvaran alchemist is a Dex bonus to chucking bombs at people, but other than that, there are definitely better options for the wyvaran.
Bard: Nothing for or against a wyvaran bard, though I kinda wish that they could take the Dragon Herald archetype, normally only available to kobolds.
Barbarian: Unfortunately, that fast movement isn't going to help your crappy flight, but there is a Wisdom bonus to counter that godawful Will save.
Cavalier: While one has to wonder what purpose a flying creature would have for a mount, a wy