Mulch
You have to wait for it to grow.
The leichi berry raises the attack stat if held by a Pokemon (that what it says in heartgold but I am not sure if it's the same in emerald)
Pataya berries must be obtained from either Pokemon colosseum or Pokemon xd gale of darkness trade a Pokemon holding the berry to emerald then plant it to get more.
No you can water them infinite times and nothing bad will happen.
The berry type that will make beauty go up are all dry berrys.
In emerald you get them in the contest hall by making them with berries.
Mulch
You have to wait for it to grow.
The leichi berry raises the attack stat if held by a Pokemon (that what it says in heartgold but I am not sure if it's the same in emerald)
Feed them good pokeblocks from durin berries.
Pataya berries must be obtained from either Pokemon colosseum or Pokemon xd gale of darkness trade a Pokemon holding the berry to emerald then plant it to get more.
No you can water them infinite times and nothing bad will happen.
Lum berries are randomly given out by the berry masters wife.
get all the Pokemon in the emerald dex
emerald has all the Pokemon
You cannot get all 202 Pokemon just on emerald because there are Pokemon that are only obtainable in either Sapphire or emerald, but when you trade on emerald it will update your pokedex to national mode.