Orius
Unrepentant DM Supremacist
I'd say don't worry too much about 2e psionics. The rules in 2e were a bit different from the 3e rules, particularly in that abilites weren't leveled like spells but were divided into major and minor powers called sciences and devotions, of which psionicists had a certain number depending on level.
Anyway, I'd say don't worry too much about psion and power levels. Just give it whatever powers fits or is a close equivalent to 2e the psionics listed above, and then have it manefest the powers as a 9th level psion, in the same way a monster uses spell-like abilities as a sorcerer of a given level. I'd go into more detail, but I don't really know the 3e psionics very well, and to be honest I don't remember 2e psionics all that well either. I'd have to dig out the old Psionics Handbook (2e version), Skills & Powers, and compare them to the SRD to get really detailed.
Anyway, I'd say don't worry too much about psion and power levels. Just give it whatever powers fits or is a close equivalent to 2e the psionics listed above, and then have it manefest the powers as a 9th level psion, in the same way a monster uses spell-like abilities as a sorcerer of a given level. I'd go into more detail, but I don't really know the 3e psionics very well, and to be honest I don't remember 2e psionics all that well either. I'd have to dig out the old Psionics Handbook (2e version), Skills & Powers, and compare them to the SRD to get really detailed.