You can buy net balls at the mossdeep city pokemart.
Chat with our AI personalities
Simply weaken it to red HP paralyze it and use as many net balls as you can.
you go fly in the air and catch him with a net
There is one, after me crawling all over the net, that works.83007CE4002183007CE6030053000020000F0448006845898089000428431860C04601480047905D0003177C06080000
In Pokemon Soulsilver, you can get a Net Ball from Johto in Goldenrod City. You have to win it from the Goldenrod Dept. Store lottery.
For Fire Red, I believe you could get 1 net ball in the game. One of them is from the fisherman south of Lavender City, and if you catch a magikarp and give it to him and it is big enough, he will give you a net ball.