Kyogre is only able to be gotten by trading for one, or migrating. You can't get him in the game with out this.
It is impossible to get kyorge, groundon or rayquaza in Pokemon platinum unless you have a cheat chart ridge
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You have to migrate it from Sapphire or Emerald.
Of course
you can using cheats,trade or using pal park but without 1 of those 3 u cant
94000130 FFFB0000 D5000000 0000017E B2101D40 00000000 C0000000 0000000B D7000000 000233EC DC000000 00000006 D2000000 00000000 Hold down Select before encountering a Pokemon in tall grass and it should allow Kyogre to appear.
Yes, as seen in the Hoopa movie, Kyogre has wings ... NOT HANDS! So yes, Kyogre can fly.