The accuracy of Hypnosis in a battle between Diamond and Platinum versions

The event-only Pokemon for 3rd Gen are:

• Mew
• Lugia
• Ho-oh
• Celebi
• Deoxys

Jirachi can be acquired with the Pokemon Colosseum bonus disk (that's where mine is from ♪).

The event-only Pokemon for 4th Gen are:

• Celebi
• Deoxys
• Darkrai
• Shaymin
• Arceus.

Mew can be acquired with Pokemon Ranch, while Lugia and Ho-oh are caught in Heart Gold/Soul Silver.

The Power of an attack directly correlates to how much damage you deal, because its presence in the damage formula is entirely multiplicative. So, an attack with 120 power will do twice as much damage as one that has 60 power. The same goes with your corresponding attack stat: a Pokemon with 100 Attack will do twice as much damage as one with 50 Attack when using the same attack on the same target.

STAB has operated consistently since Gen 1 so this applies to all of the games. It increases the Power of an attack by 50% if it matches one of your types. 60 becomes 90, for instance.

Technician increases the Base Power of an attack by 50% if its Power is 60 or less. So the most you get is boosting an attack at 60 power to 90. This occurs before STAB is calculated, so your Power would be 90 for STAB, boosting it to 135.