What is an ultimate route?
"Ultimate route" effectively means the route ultimately resolved after any recursive look-ups if necessary. A route with an exit interface
A default route is considered a gateway of last resort; meaning all ip packets that don't have a match in the routing table of a router will be forwarded to the default route. An ultimate route is a route in the routing table of a router that indicates both the next hop ip address and the exit interface.
there is no ultimate rod unless they just made one for platinum, but there is a super rod which is the best rod in the game. to get that you need to get the national dex then go to the fight area and go to the route the doesn't have water. before you go into the thing that brings you into the actual route there is a fisherman and he gives you it.