dialga don't deserves the last place in lv.x's ranks...
yes, the poke power is pure luck base, but it can disturb the opponent play, if the opponents failed to have a head on his/her flips, you possibly can turn around the game, you may be given free turn to kill your opponent's "hero", in my observation 1:6 chance to people, not only in my country, in america, canada, singapore, and japan, to get 2 heads in a row... well, data can be wrong, but speculation has more chance to failed than data.....
more over, the attack is not bad, it only can't use metal flush, not can't attack like empoleon lv.x..... the first dialga attack also can let you draw a card, that can be crucial in late game....
if you want to know the rank of popularity and who use level x in indonesia you'll be amazed....
1. Gardevoir Lv.X
2. Infernape Lv.X
3. Magmortar Lv.X
4. Electrivire Lv.X
5. Darkrai Lv.X
6. Honchkrow Lv.X
7. Palkia Lv.X
8. Dialga Lv.X
9. Lucario Lv.X
10. Cressellia Lv.X
11. Torterra Lv.X
12. Empoleon Lv.X <--- belive it or not, only 2 people that use this level x in their deck, BUT empoleon is the most popular here.....
remember this is based on popularity.....