In Red and Blue , the most common method used to encounter MissingNo was what fans dubbed the old man glitch. This required the player to talk to a man in Viridian City who showed them how to catch a Pokmon, then fly to Cinnabar Island and surf up and down the islands east coast
Id say it should be pretty high on your list
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A bit slower, but as a dork easier to get back if it dies or is milled