How do you get to brock in Pokemon Blue sea eddition?

Answer 1

there are hidden tiles from tile nr 2 from the left walk: forward 5,steps right 2,steps down 2,steps right 2,steps up 1,steps right 2,steps meet Jocker Liam, pkmn (umbreon lvl10,sandshrew lvl11) from tile nr 2 from the left walk: forward 3,steps right 2,steps up 2,steps left 5,steps down 2,steps left 2,steps from the til to the left walk: left 1,steps up 3,steps right 3,steps up 1,steps meet gymleader Brock.