1 If you have already seen them in the wild, you can use your Pokedex to track them. 2 Buy a lot of Max Repels if you can (if not then use Repel or Super Repels), have a pokemon at least a level 39 at the top of your party, and go to a route and try that. 
An easy way is to duplicate your master ball (which is fairly simple, as it involves using the PC and another Pokemon.) and then buy a lot of max repels. Get a Pokemon near level 40 and put him/her/it in the first line. Use the Max Repels. Find a route where you can enter and leave the route with nearby grass. What is the best way to find raikou and entei in pokemon crystal? I have spent a ton of money on repels and i have done the trick where you go in and out of a rout so the dogs move. Well, there are 2 ways that I know of: 1. If you have already seen them in the wild, you can use your Pokedex to track them. 2. Buy a lot of Max Repels if you can (if not then use Repel or Super Repels), have a pokemon at least a level 39 at the top of your party, and go to a route and try that. 5 years ago 2 0. up vote 11 down vote accepted. Find a route where you can enter and leave the route with nearby grass. (Ecruteak City is a good start since by the south side of this city has nearby grass). Take about 20 steps in the grass with the repel. If no Pokemon appear, Raikou or Entei are not there leave the area and come back. If no Pokemon appear, Raikou or Entei are not there. So leave the route by going back to Ecruteak and go back to the route. Take another 20 steps. Repeat this process until you eventually meet up with Entei or Raikou. If you run out of repel steps, use another repel. Duplication is different in Crystal. Well, it's level 40, so go somewhere where the pokemon are in the 30s or lower. Then get a pokemon at level 39 or something close, and use any kind of repel. After a while, you might have to go somewhere else and come back, but you should be able to get entei or maybe even raikou.
http://www.answers.com/Q/In_Pokemon_crystal_what_is_the_easiest_way_to_catch_raikou_and_entei https://answers.yahoo.com/question/index?qid=20091026101504AA7Wf6I http://www.gamefaqs.com/gbc/375087-pokemon-crystal-version/answers/222304-where-can-i-find-entei-and-raikou http://gaming.stackexchange.com/questions/61519/how-can-i-catch-raikou-in-pok%c3%a9mon-crystal http://www.answers.com/Q/How_to_catch_entei_in_crystal http://www.gamefaqs.com/gbc/375087-pokemon-crystal-version/answers/5831-what-is-the-best-way-to-capture-entei
best way to find raikou in crystal