For our Walmart fix we go to the one near Fullerton by the corner of Harbor and Orangethorpe. We usually tie it in with a visit to Toys R Us, in the same area (also made the mistake of also going to Chuck E Cheese...). The Walmart there is OK, as are all Walmarts, like others have mentioned Target is a much better shopping experience and you are likely to find what you want there. Walmart is full of stuff but not always the stuff we want.
Does the Target on Euclid have a lot of Disney merchandise? I found a photo of one aisle of plush online, but that was it. Is there a decent assortment of items? I might want to stop there on our next trip if so.
I've been to the Walmart on Euclid several times and have never had an issue there. There are two Targets that I'll go to in the Disneyland area, and one Walmart.
I just got back from a work trip and stopped at the Walmart on Euclid and the Target on Harbor. Preferred the Target on Harbor. It was cleaner and better laid out imo. I saw Disney merchandise but didn't purchase anything. The Walmart wasn't necessarily bad but I just think Target has a better quality, especially for store brands. Target had a decent food selection (we didn't check that out at Walmart). The Target on Harbor was right across from our hotel so it was very convenient.