Here's his pal Froggy. Big's pole has a magnet in the lure, but for some reason Froggy is not magnetic. A real bummer, it would have been 'cute' to catch him with the toy.
Interestingly, Big is the only figure on this line to Re-Release under the Sonic X label and KEEP all the things he originally came with. Notice the Sonic X theme box, but look inside: There's Froggy, the emeralds and his fishing pole. This Big's head does not turn, but you can move his arms, legs (which are very short) and wrists.
This box is actually a misprint box, but it still illustrates how Big looked if you bought him on the initial Sonic Adventure 1 release. The band on the front should say "Big the Cat" and have a picture of him, but instead they've accidentally added Sonic's band to the front. That may make this MIB figure worth more than normal. In the box you can see how well he was accessorized, with his magnetic fishing pole, Froggy figure, 2 Chaos Emeralds and their under-sized yet real metal rings. (This one still had magnetic feet too) You can compare this one with the Big pictured above in the other Sonic X style box.