Shameless plug alert! Yes, all of the following are my own auctions. Click each picture to be taken to the corresponding auction.
Saint Turtle! This is possibly one of the coolest TMNT action figures ever, and it was only available in Japan - No US variation exists! Saint Turtle is the result of the TMNT being adapted for Japanese anime and manga audiences. All four Turtles use transformation crystals to become "Super Turtles," then when the situation becomes most dire they combine their forces (literally!) to deliver a finishing blow.
Super Turtles Michaelangelo! This is the pre-Saint Turtle transformation of Michaelangelo. A variation of this figure was released in the US, but it differed in size and detail.
Super Turtles Donatello! Like the Michaelangelo figure above, this is the pre-Saint Turtle transformation of Donatello. A variation of this figure was released in the US, but it differed in size and detail.