These are just a few thing i found while playing my version of pokemon heartgold
1. On Mondays at the second exit of mt moon between 8pm and 12am you can watch about 6 clefairys dance around the lake! the clefairys notice you and drop a moon stone as they run away.
2. Fridays lapras can be caught in union cave
3. Look at your pokemons stats, not the numbers but the different attributes like atk and def ect. if you look closely one stat is highlighted in red and another in blue, these highlights tell which stat goes up and which stat goes down based on the pokemons nature
1. On Mondays at the second exit of mt moon between 8pm and 12am you can watch about 6 clefairys dance around the lake! the clefairys notice you and drop a moon stone as they run away.
2. Fridays lapras can be caught in union cave
3. Look at your pokemons stats, not the numbers but the different attributes like atk and def ect. if you look closely one stat is highlighted in red and another in blue, these highlights tell which stat goes up and which stat goes down based on the pokemons nature