Beta Tirtouga (Patreon)

Beta Tirtouga, as shown in Ken Sugimori artwork. It's not certain that this design would go on to inspire Tirtouga, but it seems pretty likely. The reasoning behind this assertion can be found in this article on my website, which explains the context of this particular piece of Sugimori artwork: http://lavacutcontent.com/ken-sugimori-interview-betas/