There are daily events in platinum that can help you throughout the game. you can only do these once a day, so do em all in one day and wait till the next day to do em again.

1. After you beat the elite 4 and go through all the stuff afterwards, talk to dawns sister in Sandgem town. She will tell you where a hidden pokemon swarm(swarm of pokemon you cannot normally fid in the wild)is. This is a good chance to fill your pokedex.

2. In jublife city's tv station, talk to the woman at the counter for an id lotto ticket(a ticket with a random id no.). If the numbers on the ticket match a pokemon's id no. you can get prizes like ultra balls and exp. share. if all numbers are exact to the ticket, you win a master ball.

3. In jubilife's GTS, talk to one of the blonde girls on the first floor(wearing orange). She will give you a free accesory or backdrop for your fasion case.

4. Go to Floroma town's flower shop. The girl to the right(not behind the counter)will give you a free berry(it is usually a common berry like cheri or pecha)

5. In Hearthrome city, go to the pal park on the right entrance with a pokemon and go in the cave houses until you get to a fat guy in overalls. He will give you an accesory, 5 rare berrys, and maybe a backdrop.

6. West of Hearthrome there is a house just north of the exit. go inside and talk to the old guy and he will give you a free berry(usually a common berry)

7. South of Hearthrome is the giant mansion. go inside and go up the carpet and right into the open room. listen to the mansion owners boring story. At the end of the story he will tell you a pokemon will be swarming in his trophy garden.(after elite 4)

8. In solaceon town you can go into the house beside the pokemon center and talk to the guy in front of the computer. he will tell you to bring him a pokemon you have seen or caught to him to examine. If you do this he will give you 3 random pokeballs and a heart scale.

9. In Pastoria go the very bottom of the town and go into the house closest to route 212. The woman inside will give you a rare berry that weakens super effective attacks depending on the berry.

10. In Vielstone go down the stairs from the pokemon center's entrance, go right til you reach the blonde haired guy. go down til you reach the bottom of the road follow the road going left until you reach the stairs at the end of the road and go into the closest house. The person inside will give a free massage to your pokemon and a free accesory.

11. In Sunnyshore town go onto the blue road above the pokemon center and keep going until you reach 2 houses on a rock. Go inside the house with the sign and talk to the girl. tell her a random thing and she will give you a ribbon for the first pokemon in your party.

12. In the Resort Area, if you have enough ribbons, you can go inside the giant ribbon house. go in the elevator and get a free massage to make the first pokemon in your party more friendly.

13. In the Survival Area go into the house your rival is standing in front of. Previously fought gym leaders are inside and are looking for a rematch with you. There is also someone who has teamed up with you in the past in there looking to fight you too. They have different pokemon and all are lvl 60 and up.