You can use a walkthrough up until the point where your game crashed without feeling guilty. Then make two saves, one to finish the game normally and the other to go back and get everything.

Getting a perfect game is challenging. Some items like Vagrisk Claws and Earth Mallets are hard to find (although once you get at least one you can multiply it using a glitch). Others like the Pile Banger and Parasol are found only during certain events.

Naturally you can max most stats with sources but I wonder if its worth the bother considering you defeat even Emerald and Ruby without them.

There is a plethora of helpful faqs and guides on gamefaqs.com that can help you get everything.

Internet viruses and the like are acts of vandalism. And as such are expressions of destructive impulses of those people. I pity them.