Ah, true. It's more of a cross-training thing.
Yes. I see. I believe you are referring to Guilmon, whose name is derived from Guile, moreso than a Guiro lizard or a Gila Monster. Red dinosaur with black stripes, yes? There is a yellow Vaccine variant which looks more like a Gilamonster. It's fine. I'm intending to help as much as I can.

Alright then. Cool. Yes. That would be Level 1, Baby. The "blob-shaped" ones you were talking about. Note that in Japanese, the first two stages are called Baby 1 and Baby 2, whereas in America, it was localized as Baby/Fresh and In-Training. I'd like to point out as well, that Japanese Ultimate is English Mega, and English Ultimate is Japanese Perfect. If you want variety in possible forms, and more of the attack Techniques, I recommend Wikimon.net, whereas wikia.digimon.com is more watered down. Also, I'd say any Digimon released before like... 2004, use its English name and I'll know it better, afterwards the Japanese name, unless it's sorta jumbly and obviously supposed to be something else. Best example- Valdurmon, but was listed by Bandai of America as Varodurumon, when it's based on Baldur, and should thus be Baldurmon/Baldrmon. Also "Volkdoramon" is Volcdramon/Volcanodramon.