Does anyone know if its possible to type in a number and get the resulting ASCII characters in a batch file? I think in Unix based machines you type the command then \042 or whatever number you want, but I don't know if you can do it in batch files...

If your echo accept the -e it would be like:
Otherwise use printf

Nope, that only works for bash not batch. Any other ideas?

If there isnt a way, is there a way to define them? Like have a defined as 01 so every time you use 01 it would use a in its place. I don't want to do 26 if statements for the alphabet, or 52 if I make it case sensitive, and adding symbols would be hell, so if I could make definitions some how that would be great.

*Looks Around*
Batch Files Isn't Linux and Unix Shell Scripting.....

No, This isn't possible with command.com / cmd.exe alone (Batch). In order to do it, you will need a special exe of some kind. Easy enough to write one.