I'm pretty sure Lati@s have either normal IV from the island or totally screwed IVs from being runners. The IVs of the beasts as runners are allegedly screwed IV wise as well when runners and otherwise are subject to weird Colosseum/XD/Pokemon Box (is the third the same as the first two?) IV rules that seriously need research (how would you even go about this?). The nature of screwed IVs probably needs research as well; I would guess it just overwrites your PID generated IVs with random 0s which does open new combinations but none of which are actually useful.
We're assuming Celebi and Jirachi are having their IVs generated when created on the target game for the bonus disc/Pokemon Channel and that all of them come from bonus discs/Pokemon Channel (that would make all Celebi Japanese, but that's not a big deal). Is there reason to believe otherwise?
The one safe bet is that none of them are unrestricted so we are probably being "more accurate" to use known rules instead of allowing them to do anything. Of course, precise information would allow the best representation of ingame mechanics possible, and I'll update this topic as needed with new Hidden Power combinations for new rulesets if we discover them.
We're assuming Celebi and Jirachi are having their IVs generated when created on the target game for the bonus disc/Pokemon Channel and that all of them come from bonus discs/Pokemon Channel (that would make all Celebi Japanese, but that's not a big deal). Is there reason to believe otherwise?
The one safe bet is that none of them are unrestricted so we are probably being "more accurate" to use known rules instead of allowing them to do anything. Of course, precise information would allow the best representation of ingame mechanics possible, and I'll update this topic as needed with new Hidden Power combinations for new rulesets if we discover them.