Ok... Abe can't possess Scrabs, Parimites and Slogs in AO (not to mention most things), But he gets the tattos/scars for both Scrabs and Parimites and dosnt see them again in that game... The next time he dose see Scrabs and Parimites is in AE (which if you had been following the storyline you would know is only a day after AO, and therefore too shorter time to practice posession), and he can then possess them, but he still cant possess Slogs... The next time he sees Slogs though is in MO and because the time between AE and MO is greater he has had some time to practice and is able to possess them in that game... Dose that make sence?
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