Suppose you managed to cast True mind switch in a juvenile golden dragon. As with a polymorph you don`t get supernatural or spell-like abilities. But then you remain a badass psion in a large dragon body. Imagine then, that you get enough XP to lvl. Could you use that lvl to upgrade your dragon template instead of getting another class lvl, as would be possible if it were a monster player character from the beginning?
In this case, i have a few questions.
Do you need to wait until you live long enough as a dragon to hit its next age increment (young adult in my example?) before you could spend your next lvl to improve your dragon characteristics?
If so, when you do use the lvl to upgrade dragon traits instead of leveling as a psion, do you get dragon supernatural and spell like abilities (including breath) as if you were a wyrmling, even though you`re in a body larger and older?
I assume it to be so, since you`d be learning those things fresh, even though you have an older body. Also, it would prevent you from getting too many abilities while giving out only one lvl.
Assuming the answer to the first one is that yes, you can give up a lvl to get those supernatural dragon abilities, and that you get them as a wyrmling, since you`re already in a juvenile body, must you wait until you age before you can spend that lvl or can you do it as soon as you get a new lvl, which would allow you to "catch up" to your dragon age?
Let me give you an example. If you have a juvenile body, must you wait 25 years until young adult before you can use a lvl getting dragon stuff, and then another 50 before you can do it again (which means your dragon supernatural abilities will be always behind your size physical abilities), or, assuming you managed to lvl several times in that period of time, could you choose not to lvl psion several times in order to get your dragon side to actually represent a juvenile dragon with regard to breath weapon spell-like abilities and the likes?
So, in a nutshell, after you true mind switch a dragon, can you spend lvls to get dragon stuff? If so, does it begin as if you were a wyrmling? Must you wait for your dragon body to hit a new age before you can do it? And finally, if not, can you use your new lvls to bring your dragon powers back to the age lvl of the body you possessed with true mind switch?