The site listed below has a chart for the Pokemon Finneon Diamond and Pearl edition.
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You would need the old sea chart which was given out at a Nintendo event which has long since passed.
The Old Sea Chart is a key item given out only through events (however it can be hacked into the game) and is only available to Emerald version.
Natures (not JUST in Pokemon Diamond) give your Pokemon one stat boost, as well as one stat hinderance. For example, Adamant increases attack and reduces special attack. Some natures don't have ANY effect. If you need a chart for natures, I have one made here:
in a cavern on diamond steppe island
There is no Pokemon called "Phany", but I think you mean Phanpy then in Diamond and Pearl on serebii.net I found a small chart that should helpLocation Rarity Method Max LevelRoute 207 40% Swarm Level 5(Platinum Level 18)