Bulbasaur Rocky Helmet Table

  Level  |  No Helmet  |  L20 Helmet  |  L30 Helmet  |  NoHelm and 20/30Helm Diff (ie how much damage you avoid with 20/30 helm on)
---------+-------------+--------------+--------------+-----------------------------
    1    |   94.49%    |    90.50%    |    88.63%    |       3.99% or 5.86%
---------+-------------+--------------+--------------+-----------------------------
    2    |   94.19%    |    90.23%    |    88.37%    |       3.96% or 5.82%
---------+-------------+--------------+--------------+-----------------------------
    3    |   93.90%    |    89.96%    |    88.11%    |       3.94% or 5.79%
---------+-------------+--------------+--------------+-----------------------------
    4    |   93.46%    |    89.55%    |    87.72%    |       3.91% or 5.74%
---------+-------------+--------------+--------------+-----------------------------
    5    |   92.02%    |    88.24%    |    86.46%    |       3.78% or 5.56%
---------+-------------+--------------+--------------+-----------------------------
    6    |   91.46%    |    87.72%    |    85.96%    |       3.74% or 5.50%
---------+-------------+--------------+--------------+-----------------------------
    7    |   90.77%    |    87.08%    |    85.35%    |       3.69% or 5.42%
---------+-------------+--------------+--------------+-----------------------------
    8    |   89.96%    |    86.33%    |    84.63%    |       3.63% or 5.33%
---------+-------------+--------------+--------------+-----------------------------
    9    |   87.21%    |    83.80%    |    82.19%    |       3.41% or 5.02%
---------+-------------+--------------+--------------+-----------------------------
    10   |   86.08%    |    82.76%    |    81.19%    |       3.32% or 4.89%
---------+-------------+--------------+--------------+-----------------------------
    11   |   84.87%    |    81.63%    |    80.11%    |       3.24% or 4.76%
---------+-------------+--------------+--------------+-----------------------------
    12   |   83.45%    |    80.32%    |    78.84%    |       3.13% or 4.61%
---------+-------------+--------------+--------------+-----------------------------
    13   |   81.74%    |    78.74%    |    77.32%    |       3.00% or 4.42%
---------+-------------+--------------+--------------+-----------------------------
    14   |   79.79%    |    76.92%    |    75.57%    |       2.87% or 4.22%
---------+-------------+--------------+--------------+-----------------------------
    15   |   77.52%    |    74.81%    |    73.53%    |       2.71% or 3.99%