The Wii has a built-in 512MB of flash memory that can hold many game saves, and you can also use a separate SD memory card if you wanted to or if you began to fill up the internal memory.
Hey, no offense or anything, but please try to use the Search feature, which can be found at the upper right of this page. There are already a number of threads that answer this question, many of which are right in this section. In the future, it's OK to ask these questions just try to ask them in the Wii Basics Section. Thanks and don't worry about it; you're new.
can it also have a memory card or is it just saved within the wii? i'm sorry if this question has been asked a million times, but i have to say ... im a bit slow at catching up.
Well as mentioned before, u can use a SD card. You can get SD cards in different sizes. SD card is a Secure Digital card. Google for more info, ive got a 1gig one atm.