Is it even possible to change the number seed at all on Casio calcs? On the 83+ I know you could do for example 17->Rand, but I'm not sure about Casio
Yes you can, by using Ran# (any integer between 1 and 9) which generates a number between 0 and 1. You can also use 0 as a seed but then 0 is always generated.
Nah I really meant setting the rand seed, not incrementing. On the 83+, do 1->Rand:Rand 10 times. Notice how it's always the same number. Doing such things before running a game can let you manipulate luck. Some games have a Rand command in the title screen loop to keep incrementing the seed, to prevent such luck manipulation or from the game random values from being the same after every mem clear.